497

October 12, 2012

Via EDGAR

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C., 20549

Re: Pacific Select Fund

(File Nos. 33-13954 and 811-5141)

Dear Sir or Madam:

On behalf of Pacific Select Fund (the “Fund”), transmitted herewith for filing pursuant to Rule 497 under the Securities Act of 1933, as amended (“Rule 497”), is the exhibit in the eXtensible Business Reporting Language (XBRL) format that reflects the risk/return summary information included in the prospectus supplement filed pursuant to Rule 497 on September 28, 2012 (accession number 0001193125-12-408588), to the Pacific Select Fund Prospectus dated May 1, 2012. Such supplement is incorporated by reference into this Rule 497 document.

If you have any questions or comments, please contact the undersigned at (949) 219-3391 or by e-mail at jglallande@pacificlife.com.

Sincerely,

/s/ J.G. Lallande

J.G. Lallande, Esq.,

Fund Counsel

cc: Audrey L. Cheng, Esq., Fund Counsel

Anthony H. Zacharski, Esq., Dechert LLP

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SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Disclosure Changes to the Portfolio summaries section

Long/Short Large-Cap Portfolio – Effective October 1, 2012, the expenses associated with the Portfolio's securities lending program will increase. To minimize the impact of increased expenses to the portfolio's shareholders, Pacific Life Fund Advisors LLC (PLFA), the investment adviser to the portfolio, will waive 0.05% from its advisory fee through April 30, 2014 and the fee paid to J.P. Morgan Investment Management, Inc. for providing sub-advisory services will be reduced by 0.05%. The fee table and expense example will also be replaced with the following:

Annual Fund Operating Expenses¹ (expenses that you pay each year as a percentage of the value of your investment)

	Class I			Class P
Management fee		1.00			1.00
Service fee		0.20			0.00
Other expenses		0.82			0.82
Total annual operating expenses		2.02			1.82
Less fee waiver2		(0.05	)		(0.05	)
Total annual operating expenses after fee waiver		1.97			1.77

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2014. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I		Class P
1 year	$	200	$	180
3 year	$	629	$	568
5 year	$	1,083	$	981
10 year	$	2,344	$	2,133

Mid-Cap Equity Portfolio –

Effective January 1, 2013, the following replaces the second and third paragraph in the Principal investment strategies subsection:

The portfolio will invest primarily in securities of U.S. companies, but may invest up to 20% of its assets in securities of foreign companies, including through American Depositary Receipts (“ADRs”).

The manager seeks to invest in the securities of companies that are expected to benefit from macroeconomic or company-specific factors, and that are attractively priced relative to their fundamentals. In making investment decisions, the manager considers fundamental factors such as cash flow, financial strength, profitability, statistical valuation measures, potential or actual catalysts that could move the share price, accounting practices, management quality, risk factors such as litigation, the estimated fair value of the company, general economic and industry conditions, and additional information as appropriate.

Further, effective January 1, 2013, the following is added to the Principal risks subsection:

• Currency Risk: Securities denominated in foreign currencies may be affected by changes in rates of exchange between those currencies and the U.S. dollar. Currency exchange rates may be volatile and may be affected by, among other factors, the general economic conditions of a country, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls, and speculation. A decline in the value of a foreign currency versus the U.S. dollar reduces the value in U.S. dollars of investments denominated in that foreign currency.

• Foreign Markets Risk: Exposure to foreign markets through issuers can involve additional risks relating to market, economic, political, regulatory, geopolitical, or other conditions. These factors can make foreign investments more volatile and less liquid than U.S. investments. In addition, foreign markets can react differently to these conditions than the U.S. market.  

Portfolio Optimization Conservative Portfolio, Portfolio Optimization Moderate-Conservative Portfolio, Portfolio Optimization Moderate Portfolio, Portfolio Optimization Growth Portfolio and Portfolio Optimization Aggressive-Growth Portfolio (the “Portfolio Optimization Portfolios”):

Each Portfolio Optimization Portfolio's Annual fund operating expenses table and expense example are replaced with the following:

Portfolio Optimization Conservative Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.57
Total annual operating expenses		0.88
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.78

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	80
3 year	$	271
5 year	$	478
10 year	$	1,075

Portfolio Optimization Moderate-Conservative Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.60
Total annual operating expenses		0.91
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.81

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	83
3 year	$	280
5 year	$	494
10 year	$	1,110

Portfolio Optimization Moderate Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.69
Total annual operating expenses		1.00
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.90

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	92
3 year	$	308
5 year	$	543
10 year	$	1,216

Portfolio Optimization Growth Portfolio

Annual fund operating expenses¹ (expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.74
Total annual operating expenses		1.05
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.95

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	97
3 year	$	324
5 year	$	570
10 year	$	1,274

Portfolio Optimization Aggressive-Growth Portfolio

Annual fund operating expenses¹ (expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.78
Total annual operating expenses		1.09
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.99

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	101
3 year	$	337
5 year	$	591
10 year	$	1,320

The second sentence of the second paragraph of each Portfolio Optimization Portfolio's Principal investment strategies subsection is replaced with the following:

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

In the same subsection, the following is added as the fourth paragraph:

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

In the same subsection, the first sentence of the current fourth paragraph is replaced with the following:

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

The following is added to each Portfolio Optimization Portfolio's Principal risks from holdings in Underlying Portfolios subsection:

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

Portfolio Optimization Conservative Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Geographic Concentration Risk: Concentrating investments in a single country, a limited number of countries, or a particular geographic region makes the portfolio more susceptible to adverse economic, political, social, regulatory and other developments in that country, countries or region.

Portfolio Optimization Moderate Portfolio, Portfolio Optimization Growth Portfolio and Portfolio Optimization Aggressive-Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

• Short Exposure Risk: When a portfolio takes a short position using derivative instruments in anticipation of a decline in the market price (i.e., spot price or spot rate) of the underlying reference asset, such as entering into a derivative contract to sell a currency at a predetermined price for future delivery (forward foreign currency contract) in anticipation of a decline in the market price of the underlying currency, it is subject to the risk that the reference asset will increase in value, resulting in a loss. Such loss is theoretically unlimited. Short positions also may expose the portfolio to leverage risk.

Portfolio Optimization Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• High-Yield or “Junk” Securities Risk: High yield securities are typically issued by companies that are highly leveraged, less creditworthy or financially distressed and are considered to be mostly speculative in nature (high risk), potentially less liquid, and subject to a greater risk of loss, that is they are more likely to default than higher rated securities.

• Short Sale Risk: A short sale involves the risk that the price at which the portfolio purchases a security to replace the borrowed security may be higher than the price that the portfolio sold the security, resulting in a loss to the portfolio. Such loss is theoretically unlimited. Short sales also involve certain costs and may expose the portfolio to leverage risk.

Portfolio Optimization Aggressive-Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Debt Securities Risk: Debt securities are affected by many factors, including prevailing interest rates, market conditions and market liquidity. Volatility of below investment grade debt securities (including loans), may be relatively greater than for investment grade securities.

• Regulatory Impact Risk: Certain financial instruments are subject to extensive government regulation, which may change unexpectedly and frequently, and may impact a portfolio significantly.

• Short Sale Risk: A short sale involves the risk that the price at which the portfolio purchases a security to replace the borrowed security may be higher than the price that the portfolio sold the security, resulting in a loss to the portfolio. Such loss is theoretically unlimited. Short sales also involve certain costs and may expose the portfolio to leverage risk.

• U.S. Government Securities Risk: Not all U.S. government securities are backed or guaranteed by the U.S. government and different U.S. government securities are subject to varying degrees of credit risk. There is risk that the U.S. government will not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. 

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

PACIFIC SELECT FUND

Prospectus Date

rr_ProspectusDate

May 01, 2012

Supplement [Text Block]

psf1_SupplementTextBlock

SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Disclosure Changes to the Portfolio summaries section

Long/Short Large-Cap Portfolio – Effective October 1, 2012, the expenses associated with the Portfolio's securities lending program will increase. To minimize the impact of increased expenses to the portfolio's shareholders, Pacific Life Fund Advisors LLC (PLFA), the investment adviser to the portfolio, will waive 0.05% from its advisory fee through April 30, 2014 and the fee paid to J.P. Morgan Investment Management, Inc. for providing sub-advisory services will be reduced by 0.05%. The fee table and expense example will also be replaced with the following:

Annual Fund Operating Expenses¹ (expenses that you pay each year as a percentage of the value of your investment)

	Class I			Class P
Management fee		1.00			1.00
Service fee		0.20			0.00
Other expenses		0.82			0.82
Total annual operating expenses		2.02			1.82
Less fee waiver2		(0.05	)		(0.05	)
Total annual operating expenses after fee waiver		1.97			1.77

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2014. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I		Class P
1 year	$	200	$	180
3 year	$	629	$	568
5 year	$	1,083	$	981
10 year	$	2,344	$	2,133

Mid-Cap Equity Portfolio –

Effective January 1, 2013, the following replaces the second and third paragraph in the Principal investment strategies subsection:

The portfolio will invest primarily in securities of U.S. companies, but may invest up to 20% of its assets in securities of foreign companies, including through American Depositary Receipts (“ADRs”).

The manager seeks to invest in the securities of companies that are expected to benefit from macroeconomic or company-specific factors, and that are attractively priced relative to their fundamentals. In making investment decisions, the manager considers fundamental factors such as cash flow, financial strength, profitability, statistical valuation measures, potential or actual catalysts that could move the share price, accounting practices, management quality, risk factors such as litigation, the estimated fair value of the company, general economic and industry conditions, and additional information as appropriate.

Further, effective January 1, 2013, the following is added to the Principal risks subsection:

• Currency Risk: Securities denominated in foreign currencies may be affected by changes in rates of exchange between those currencies and the U.S. dollar. Currency exchange rates may be volatile and may be affected by, among other factors, the general economic conditions of a country, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls, and speculation. A decline in the value of a foreign currency versus the U.S. dollar reduces the value in U.S. dollars of investments denominated in that foreign currency.

• Foreign Markets Risk: Exposure to foreign markets through issuers can involve additional risks relating to market, economic, political, regulatory, geopolitical, or other conditions. These factors can make foreign investments more volatile and less liquid than U.S. investments. In addition, foreign markets can react differently to these conditions than the U.S. market.  

Portfolio Optimization Conservative Portfolio, Portfolio Optimization Moderate-Conservative Portfolio, Portfolio Optimization Moderate Portfolio, Portfolio Optimization Growth Portfolio and Portfolio Optimization Aggressive-Growth Portfolio (the “Portfolio Optimization Portfolios”):

Each Portfolio Optimization Portfolio's Annual fund operating expenses table and expense example are replaced with the following:

Portfolio Optimization Conservative Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.57
Total annual operating expenses		0.88
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.78

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	80
3 year	$	271
5 year	$	478
10 year	$	1,075

Portfolio Optimization Moderate-Conservative Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.60
Total annual operating expenses		0.91
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.81

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	83
3 year	$	280
5 year	$	494
10 year	$	1,110

Portfolio Optimization Moderate Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.69
Total annual operating expenses		1.00
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.90

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	92
3 year	$	308
5 year	$	543
10 year	$	1,216

Portfolio Optimization Growth Portfolio

Annual fund operating expenses¹ (expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.74
Total annual operating expenses		1.05
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.95

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	97
3 year	$	324
5 year	$	570
10 year	$	1,274

Portfolio Optimization Aggressive-Growth Portfolio

Annual fund operating expenses¹ (expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.78
Total annual operating expenses		1.09
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.99

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	101
3 year	$	337
5 year	$	591
10 year	$	1,320

The second sentence of the second paragraph of each Portfolio Optimization Portfolio's Principal investment strategies subsection is replaced with the following:

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

In the same subsection, the following is added as the fourth paragraph:

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

In the same subsection, the first sentence of the current fourth paragraph is replaced with the following:

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

The following is added to each Portfolio Optimization Portfolio's Principal risks from holdings in Underlying Portfolios subsection:

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

Portfolio Optimization Conservative Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Geographic Concentration Risk: Concentrating investments in a single country, a limited number of countries, or a particular geographic region makes the portfolio more susceptible to adverse economic, political, social, regulatory and other developments in that country, countries or region.

Portfolio Optimization Moderate Portfolio, Portfolio Optimization Growth Portfolio and Portfolio Optimization Aggressive-Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

• Short Exposure Risk: When a portfolio takes a short position using derivative instruments in anticipation of a decline in the market price (i.e., spot price or spot rate) of the underlying reference asset, such as entering into a derivative contract to sell a currency at a predetermined price for future delivery (forward foreign currency contract) in anticipation of a decline in the market price of the underlying currency, it is subject to the risk that the reference asset will increase in value, resulting in a loss. Such loss is theoretically unlimited. Short positions also may expose the portfolio to leverage risk.

Portfolio Optimization Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• High-Yield or “Junk” Securities Risk: High yield securities are typically issued by companies that are highly leveraged, less creditworthy or financially distressed and are considered to be mostly speculative in nature (high risk), potentially less liquid, and subject to a greater risk of loss, that is they are more likely to default than higher rated securities.

• Short Sale Risk: A short sale involves the risk that the price at which the portfolio purchases a security to replace the borrowed security may be higher than the price that the portfolio sold the security, resulting in a loss to the portfolio. Such loss is theoretically unlimited. Short sales also involve certain costs and may expose the portfolio to leverage risk.

Portfolio Optimization Aggressive-Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Debt Securities Risk: Debt securities are affected by many factors, including prevailing interest rates, market conditions and market liquidity. Volatility of below investment grade debt securities (including loans), may be relatively greater than for investment grade securities.

• Regulatory Impact Risk: Certain financial instruments are subject to extensive government regulation, which may change unexpectedly and frequently, and may impact a portfolio significantly.

• Short Sale Risk: A short sale involves the risk that the price at which the portfolio purchases a security to replace the borrowed security may be higher than the price that the portfolio sold the security, resulting in a loss to the portfolio. Such loss is theoretically unlimited. Short sales also involve certain costs and may expose the portfolio to leverage risk.

• U.S. Government Securities Risk: Not all U.S. government securities are backed or guaranteed by the U.S. government and different U.S. government securities are subject to varying degrees of credit risk. There is risk that the U.S. government will not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. 

Long/Short Large-Cap Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

psf1_SupplementTextBlock

SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Long/Short Large-Cap Portfolio – Effective October 1, 2012, the expenses associated with the Portfolio's securities lending program will increase. To minimize the impact of increased expenses to the portfolio's shareholders, Pacific Life Fund Advisors LLC (PLFA), the investment adviser to the portfolio, will waive 0.05% from its advisory fee through April 30, 2014 and the fee paid to J.P. Morgan Investment Management, Inc. for providing sub-advisory services will be reduced by 0.05%. The fee table and expense example will also be replaced with the following:

Annual Fund Operating Expenses¹ (expenses that you pay each year as a percentage of the value of your investment)

	Class I			Class P
Management fee		1.00			1.00
Service fee		0.20			0.00
Other expenses		0.82			0.82
Total annual operating expenses		2.02			1.82
Less fee waiver2		(0.05	)		(0.05	)
Total annual operating expenses after fee waiver		1.97			1.77

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2014. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I		Class P
1 year	$	200	$	180
3 year	$	629	$	568
5 year	$	1,083	$	981
10 year	$	2,344	$	2,133

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2014

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

The expense information has been restated to reflect current fees.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Your expenses (in dollars) if you sell/redeem all of your shares at the end of each period

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Your expenses (in dollars) if you hold all of your shares at the end of each period

Long/Short Large-Cap Portfolio | Class I

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

1.00%

^[1]

Service fee

rr_Component1OtherExpensesOverAssets

0.20%

^[1]

Other expenses

rr_OtherExpensesOverAssets

0.82%

^[1]

Total annual operating expenses

rr_ExpensesOverAssets

2.02%

^[1]

Less fee waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[1],[2]

Total annual operating expenses after fee waiver

rr_NetExpensesOverAssets

1.97%

^[1]

1 year

rr_ExpenseExampleYear01

200

3 year

rr_ExpenseExampleYear03

629

5 year

rr_ExpenseExampleYear05

1,083

10 year

rr_ExpenseExampleYear10

2,344

1 year

rr_ExpenseExampleNoRedemptionYear01

200

3 year

rr_ExpenseExampleNoRedemptionYear03

629

5 year

rr_ExpenseExampleNoRedemptionYear05

1,083

10 year

rr_ExpenseExampleNoRedemptionYear10

2,344

Long/Short Large-Cap Portfolio | Class P

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

1.00%

^[1]

Service fee

rr_Component1OtherExpensesOverAssets

none

^[1]

Other expenses

rr_OtherExpensesOverAssets

0.82%

^[1]

Total annual operating expenses

rr_ExpensesOverAssets

1.82%

^[1]

Less fee waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[1],[2]

Total annual operating expenses after fee waiver

rr_NetExpensesOverAssets

1.77%

^[1]

1 year

rr_ExpenseExampleYear01

180

3 year

rr_ExpenseExampleYear03

568

5 year

rr_ExpenseExampleYear05

981

10 year

rr_ExpenseExampleYear10

2,133

1 year

rr_ExpenseExampleNoRedemptionYear01

180

3 year

rr_ExpenseExampleNoRedemptionYear03

568

5 year

rr_ExpenseExampleNoRedemptionYear05

981

10 year

rr_ExpenseExampleNoRedemptionYear10

2,133

Mid-Cap Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

psf1_SupplementTextBlock

SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Mid-Cap Equity Portfolio –

Effective January 1, 2013, the following replaces the second and third paragraph in the Principal investment strategies subsection:

The portfolio will invest primarily in securities of U.S. companies, but may invest up to 20% of its assets in securities of foreign companies, including through American Depositary Receipts (“ADRs”).

The manager seeks to invest in the securities of companies that are expected to benefit from macroeconomic or company-specific factors, and that are attractively priced relative to their fundamentals. In making investment decisions, the manager considers fundamental factors such as cash flow, financial strength, profitability, statistical valuation measures, potential or actual catalysts that could move the share price, accounting practices, management quality, risk factors such as litigation, the estimated fair value of the company, general economic and industry conditions, and additional information as appropriate.

Further, effective January 1, 2013, the following is added to the Principal risks subsection:

• Currency Risk: Securities denominated in foreign currencies may be affected by changes in rates of exchange between those currencies and the U.S. dollar. Currency exchange rates may be volatile and may be affected by, among other factors, the general economic conditions of a country, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls, and speculation. A decline in the value of a foreign currency versus the U.S. dollar reduces the value in U.S. dollars of investments denominated in that foreign currency.

• Foreign Markets Risk: Exposure to foreign markets through issuers can involve additional risks relating to market, economic, political, regulatory, geopolitical, or other conditions. These factors can make foreign investments more volatile and less liquid than U.S. investments. In addition, foreign markets can react differently to these conditions than the U.S. market.  

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The portfolio will invest primarily in securities of U.S. companies, but may invest up to 20% of its assets in securities of foreign companies, including through American Depositary Receipts (“ADRs”).

The manager seeks to invest in the securities of companies that are expected to benefit from macroeconomic or company-specific factors, and that are attractively priced relative to their fundamentals. In making investment decisions, the manager considers fundamental factors such as cash flow, financial strength, profitability, statistical valuation measures, potential or actual catalysts that could move the share price, accounting practices, management quality, risk factors such as litigation, the estimated fair value of the company, general economic and industry conditions, and additional information as appropriate.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Currency Risk: Securities denominated in foreign currencies may be affected by changes in rates of exchange between those currencies and the U.S. dollar. Currency exchange rates may be volatile and may be affected by, among other factors, the general economic conditions of a country, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls, and speculation. A decline in the value of a foreign currency versus the U.S. dollar reduces the value in U.S. dollars of investments denominated in that foreign currency.

• Foreign Markets Risk: Exposure to foreign markets through issuers can involve additional risks relating to market, economic, political, regulatory, geopolitical, or other conditions. These factors can make foreign investments more volatile and less liquid than U.S. investments. In addition, foreign markets can react differently to these conditions than the U.S. market.  

Portfolio Optimization Conservative Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

psf1_SupplementTextBlock

SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Each Portfolio Optimization Portfolio's Annual fund operating expenses table and expense example are replaced with the following:

Portfolio Optimization Conservative Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.57
Total annual operating expenses		0.88
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.78

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	80
3 year	$	271
5 year	$	478
10 year	$	1,075

The second sentence of the second paragraph of each Portfolio Optimization Portfolio's Principal investment strategies subsection is replaced with the following:

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

In the same subsection, the following is added as the fourth paragraph:

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

In the same subsection, the first sentence of the current fourth paragraph is replaced with the following:

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

The following is added to each Portfolio Optimization Portfolio's Principal risks from holdings in Underlying Portfolios subsection:

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

Portfolio Optimization Conservative Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Geographic Concentration Risk: Concentrating investments in a single country, a limited number of countries, or a particular geographic region makes the portfolio more susceptible to adverse economic, political, social, regulatory and other developments in that country, countries or region.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2013

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

The expense information has been restated to reflect current fees.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Your expenses (in dollars) if you sell/redeem all of your shares at the end of each period

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Your expenses (in dollars) if you hold all of your shares at the end of each period

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

• Geographic Concentration Risk: Concentrating investments in a single country, a limited number of countries, or a particular geographic region makes the portfolio more susceptible to adverse economic, political, social, regulatory and other developments in that country, countries or region.

Portfolio Optimization Conservative Portfolio | Class I

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.10%

^[1]

Service fee

rr_Component1OtherExpensesOverAssets

0.20%

^[1]

Other expenses

rr_OtherExpensesOverAssets

0.01%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.57%

^[1]

Total annual operating expenses

rr_ExpensesOverAssets

0.88%

^[1]

Less fee waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[1],[3]

Total annual operating expenses after fee waiver

rr_NetExpensesOverAssets

0.78%

^[1]

1 year

rr_ExpenseExampleYear01

80

3 year

rr_ExpenseExampleYear03

271

5 year

rr_ExpenseExampleYear05

478

10 year

rr_ExpenseExampleYear10

1,075

1 year

rr_ExpenseExampleNoRedemptionYear01

80

3 year

rr_ExpenseExampleNoRedemptionYear03

271

5 year

rr_ExpenseExampleNoRedemptionYear05

478

10 year

rr_ExpenseExampleNoRedemptionYear10

1,075

Portfolio Optimization Moderate-Conservative Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

psf1_SupplementTextBlock

SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Portfolio Optimization Moderate-Conservative Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.60
Total annual operating expenses		0.91
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.81

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	83
3 year	$	280
5 year	$	494
10 year	$	1,110

The second sentence of the second paragraph of each Portfolio Optimization Portfolio's Principal investment strategies subsection is replaced with the following:

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

In the same subsection, the following is added as the fourth paragraph:

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

▪ Forward foreign currency contracts;

▪ Foreign currency options;

▪ High yield debt securities;

▪ Swaps (such as interest rate, cross-currency, total return and credit default swaps);

▪ Futures on securities, indexes, currencies and other investments; and

▪ Precious metals-related equity securities.

In the same subsection, the first sentence of the current fourth paragraph is replaced with the following:

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

The following is added to each Portfolio Optimization Portfolio's Principal risks from holdings in Underlying Portfolios subsection:

▪ Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2013

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

The expense information has been restated to reflect current fees.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Your expenses (in dollars) if you sell/redeem all of your shares at the end of each period

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Your expenses (in dollars) if you hold all of your shares at the end of each period

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

Portfolio Optimization Moderate-Conservative Portfolio | Class I

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.10%

^[1]

Service fee

rr_Component1OtherExpensesOverAssets

0.20%

^[1]

Other expenses

rr_OtherExpensesOverAssets

0.01%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.60%

^[1]

Total annual operating expenses

rr_ExpensesOverAssets

0.91%

^[1]

Less fee waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[1],[3]

Total annual operating expenses after fee waiver

rr_NetExpensesOverAssets

0.81%

^[1]

1 year

rr_ExpenseExampleYear01

83

3 year

rr_ExpenseExampleYear03

280

5 year

rr_ExpenseExampleYear05

494

10 year

rr_ExpenseExampleYear10

1,110

1 year

rr_ExpenseExampleNoRedemptionYear01

83

3 year

rr_ExpenseExampleNoRedemptionYear03

280

5 year

rr_ExpenseExampleNoRedemptionYear05

494

10 year

rr_ExpenseExampleNoRedemptionYear10

1,110

Portfolio Optimization Moderate Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

psf1_SupplementTextBlock

SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Portfolio Optimization Moderate Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.69
Total annual operating expenses		1.00
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.90

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	92
3 year	$	308
5 year	$	543
10 year	$	1,216

The second sentence of the second paragraph of each Portfolio Optimization Portfolio's Principal investment strategies subsection is replaced with the following:

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

In the same subsection, the following is added as the fourth paragraph:

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

In the same subsection, the first sentence of the current fourth paragraph is replaced with the following:

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

The following is added to each Portfolio Optimization Portfolio's Principal risks from holdings in Underlying Portfolios subsection:

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

Portfolio Optimization Moderate Portfolio, Portfolio Optimization Growth Portfolio and Portfolio Optimization Aggressive-Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

• Short Exposure Risk: When a portfolio takes a short position using derivative instruments in anticipation of a decline in the market price (i.e., spot price or spot rate) of the underlying reference asset, such as entering into a derivative contract to sell a currency at a predetermined price for future delivery (forward foreign currency contract) in anticipation of a decline in the market price of the underlying currency, it is subject to the risk that the reference asset will increase in value, resulting in a loss. Such loss is theoretically unlimited. Short positions also may expose the portfolio to leverage risk.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2013

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

The expense information has been restated to reflect current fees.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Your expenses (in dollars) if you sell/redeem all of your shares at the end of each period

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Your expenses (in dollars) if you hold all of your shares at the end of each period

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

• Short Exposure Risk: When a portfolio takes a short position using derivative instruments in anticipation of a decline in the market price (i.e., spot price or spot rate) of the underlying reference asset, such as entering into a derivative contract to sell a currency at a predetermined price for future delivery (forward foreign currency contract) in anticipation of a decline in the market price of the underlying currency, it is subject to the risk that the reference asset will increase in value, resulting in a loss. Such loss is theoretically unlimited. Short positions also may expose the portfolio to leverage risk.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

Portfolio Optimization Moderate Portfolio | Class I

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.10%

^[1]

Service fee

rr_Component1OtherExpensesOverAssets

0.20%

^[1]

Other expenses

rr_OtherExpensesOverAssets

0.01%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.69%

^[1]

Total annual operating expenses

rr_ExpensesOverAssets

1.00%

^[1]

Less fee waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[1],[3]

Total annual operating expenses after fee waiver

rr_NetExpensesOverAssets

0.90%

^[1]

1 year

rr_ExpenseExampleYear01

92

3 year

rr_ExpenseExampleYear03

308

5 year

rr_ExpenseExampleYear05

543

10 year

rr_ExpenseExampleYear10

1,216

1 year

rr_ExpenseExampleNoRedemptionYear01

92

3 year

rr_ExpenseExampleNoRedemptionYear03

308

5 year

rr_ExpenseExampleNoRedemptionYear05

543

10 year

rr_ExpenseExampleNoRedemptionYear10

1,216

Portfolio Optimization Growth Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

psf1_SupplementTextBlock

SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Portfolio Optimization Growth Portfolio

Annual fund operating expenses¹ (expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.74
Total annual operating expenses		1.05
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.95

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	97
3 year	$	324
5 year	$	570
10 year	$	1,274

The second sentence of the second paragraph of each Portfolio Optimization Portfolio's Principal investment strategies subsection is replaced with the following:

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

In the same subsection, the following is added as the fourth paragraph:

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

▪ Forward foreign currency contracts;

▪ Foreign currency options;

▪ High yield debt securities;

▪ Swaps (such as interest rate, cross-currency, total return and credit default swaps);

▪ Futures on securities, indexes, currencies and other investments; and

▪ Precious metals-related equity securities.

In the same subsection, the first sentence of the current fourth paragraph is replaced with the following:

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

The following is added to each Portfolio Optimization Portfolio's Principal risks from holdings in Underlying Portfolios subsection:

▪ Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

Portfolio Optimization Moderate Portfolio, Portfolio Optimization Growth Portfolio and Portfolio Optimization Aggressive-Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

▪ Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

▪ Short Exposure Risk: When a portfolio takes a short position using derivative instruments in anticipation of a decline in the market price (i.e., spot price or spot rate) of the underlying reference asset, such as entering into a derivative contract to sell a currency at a predetermined price for future delivery (forward foreign currency contract) in anticipation of a decline in the market price of the underlying currency, it is subject to the risk that the reference asset will increase in value, resulting in a loss. Such loss is theoretically unlimited. Short positions also may expose the portfolio to leverage risk.

Portfolio Optimization Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

▪ High-Yield or "Junk" Securities Risk: High yield securities are typically issued by companies that are highly leveraged, less creditworthy or financially distressed and are considered to be mostly speculative in nature (high risk), potentially less liquid, and subject to a greater risk of loss, that is they are more likely to default than higher rated securities.

▪ Short Sale Risk: A short sale involves the risk that the price at which the portfolio purchases a security to replace the borrowed security may be higher than the price that the portfolio sold the security, resulting in a loss to the portfolio. Such loss is theoretically unlimited. Short sales also involve certain costs and may expose the portfolio to leverage risk.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2013

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

The expense information has been restated to reflect current fees.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Your expenses (in dollars) if you sell/redeem all of your shares at the end of each period

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Your expenses (in dollars) if you hold all of your shares at the end of each period

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

• Short Exposure Risk: When a portfolio takes a short position using derivative instruments in anticipation of a decline in the market price (i.e., spot price or spot rate) of the underlying reference asset, such as entering into a derivative contract to sell a currency at a predetermined price for future delivery (forward foreign currency contract) in anticipation of a decline in the market price of the underlying currency, it is subject to the risk that the reference asset will increase in value, resulting in a loss. Such loss is theoretically unlimited. Short positions also may expose the portfolio to leverage risk.

• High-Yield or “Junk” Securities Risk: High yield securities are typically issued by companies that are highly leveraged, less creditworthy or financially distressed and are considered to be mostly speculative in nature (high risk), potentially less liquid, and subject to a greater risk of loss, that is they are more likely to default than higher rated securities.

• Short Sale Risk: A short sale involves the risk that the price at which the portfolio purchases a security to replace the borrowed security may be higher than the price that the portfolio sold the security, resulting in a loss to the portfolio. Such loss is theoretically unlimited. Short sales also involve certain costs and may expose the portfolio to leverage risk.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

Portfolio Optimization Growth Portfolio | Class I

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.10%

^[1]

Service fee

rr_Component1OtherExpensesOverAssets

0.20%

^[1]

Other expenses

rr_OtherExpensesOverAssets

0.01%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.74%

^[1]

Total annual operating expenses

rr_ExpensesOverAssets

1.05%

^[1]

Less fee waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[1],[3]

Total annual operating expenses after fee waiver

rr_NetExpensesOverAssets

0.95%

^[1]

1 year

rr_ExpenseExampleYear01

97

3 year

rr_ExpenseExampleYear03

324

5 year

rr_ExpenseExampleYear05

570

10 year

rr_ExpenseExampleYear10

1,274

1 year

rr_ExpenseExampleNoRedemptionYear01

97

3 year

rr_ExpenseExampleNoRedemptionYear03

324

5 year

rr_ExpenseExampleNoRedemptionYear05

570

10 year

rr_ExpenseExampleNoRedemptionYear10

1,274

Portfolio Optimization Aggressive-Growth Portfolio

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

psf1_SupplementTextBlock

SUPPLEMENT DATED SEPTEMBER 28, 2012

TO THE PROSPECTUS FOR PACIFIC SELECT FUND

CLASS I AND P SHARES DATED MAY 1, 2012

This supplement revises the Pacific Select Fund Class I and P Shares prospectus dated May 1, 2012 as supplemented August 24, 2012 (Prospectus), and must be preceded or accompanied by the Prospectus. The changes within this supplement are effective as of the date of the supplement, unless otherwise noted. Remember to review the Prospectus for other important information.

Portfolio Optimization Aggressive-Growth Portfolio

Annual fund operating expenses¹(expenses that you pay each year as a percentage of the value of your investment)

	Class I
Management fee		0.10
Service fee		0.20
Other expenses		0.01
Acquired fund fees and expenses		0.78
Total annual operating expenses		1.09
Less fee waiver2		(0.10	)
Total annual operating expenses after fee waiver		0.99

¹   The expense information has been restated to reflect current fees.

²   The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

Your expenses (in dollars) if you sell/redeem or hold all of your shares at the end of each period

	Class I
1 year	$	101
3 year	$	337
5 year	$	591
10 year	$	1,320

The second sentence of the second paragraph of each Portfolio Optimization Portfolio's Principal investment strategies subsection is replaced with the following:

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

In the same subsection, the following is added as the fourth paragraph:

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

In the same subsection, the first sentence of the current fourth paragraph is replaced with the following:

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

The following is added to each Portfolio Optimization Portfolio's Principal risks from holdings in Underlying Portfolios subsection:

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

Portfolio Optimization Moderate Portfolio, Portfolio Optimization Growth Portfolio and Portfolio Optimization Aggressive-Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

• Short Exposure Risk: When a portfolio takes a short position using derivative instruments in anticipation of a decline in the market price (i.e., spot price or spot rate) of the underlying reference asset, such as entering into a derivative contract to sell a currency at a predetermined price for future delivery (forward foreign currency contract) in anticipation of a decline in the market price of the underlying currency, it is subject to the risk that the reference asset will increase in value, resulting in a loss. Such loss is theoretically unlimited. Short positions also may expose the portfolio to leverage risk.

Portfolio Optimization Aggressive-Growth Portfolio: The following is added to the Principal risks from holdings in Underlying Portfolios subsection:

▪ Debt Securities Risk: Debt securities are affected by many factors, including prevailing interest rates, market conditions and market liquidity. Volatility of below investment grade debt securities (including loans), may be relatively greater than for investment grade securities.

▪ Regulatory Impact Risk: Certain financial instruments are subject to extensive government regulation, which may change unexpectedly and frequently, and may impact a portfolio significantly.

▪ Short Sale Risk: A short sale involves the risk that the price at which the portfolio purchases a security to replace the borrowed security may be higher than the price that the portfolio sold the security, resulting in a loss to the portfolio. Such loss is theoretically unlimited. Short sales also involve certain costs and may expose the portfolio to leverage risk.

▪ U.S. Government Securities Risk: Not all U.S. government securities are backed or guaranteed by the U.S. government and different U.S. government securities are subject to varying degrees of credit risk. There is risk that the U.S. government will not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2013

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

The expense information has been restated to reflect current fees.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Your expenses (in dollars) if you sell/redeem all of your shares at the end of each period

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Your expenses (in dollars) if you hold all of your shares at the end of each period

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Within the broad asset classes of debt and equity, the portfolio diversifies its holdings by investing in Underlying Portfolios that represent a variety of investment styles and security types, including alternative or non-traditional investment strategies. Alternative or non-traditional investment strategies generally are expected to have low to moderate correlation to traditional equity and fixed income investments and, as a result, may offer diversification benefits.

The portion of the portfolio invested in alternative or non-traditional investment strategies may be allocated to Underlying Portfolios that, in turn, invest in equity or debt securities or other instruments, which may include, among others:

• Forward foreign currency contracts;

• Foreign currency options;

• High yield debt securities;

• Swaps (such as interest rate, cross-currency, total return and credit default swaps);

• Futures on securities, indexes, currencies and other investments; and

• Precious metals-related equity securities.

The portfolio may also, at any time, invest in Underlying Portfolios that hold other debt or equity securities or other instruments.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Correlation Risk: While the performance of an Underlying Portfolio that represents an alternative or non-traditional investment strategy is generally expected to have low to moderate correlation with the performance of traditional equity and fixed income investments over long-term periods, the actual performance of such Underlying Portfolio may be correlated with those traditional investments over short- or long-term periods. Should there be periods when such Underlying Portfolio's performance is correlated with those traditional investments, any intended diversification effect of including such alternative or non-traditional Underlying Portfolio as part of an asset allocation strategy may not be achieved, thereby resulting in increased volatility of an asset allocation strategy that includes the Underlying Portfolio.

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

• Short Exposure Risk: When a portfolio takes a short position using derivative instruments in anticipation of a decline in the market price (i.e., spot price or spot rate) of the underlying reference asset, such as entering into a derivative contract to sell a currency at a predetermined price for future delivery (forward foreign currency contract) in anticipation of a decline in the market price of the underlying currency, it is subject to the risk that the reference asset will increase in value, resulting in a loss. Such loss is theoretically unlimited. Short positions also may expose the portfolio to leverage risk.

• Debt Securities Risk: Debt securities are affected by many factors, including prevailing interest rates, market conditions and market liquidity. Volatility of below investment grade debt securities (including loans), may be relatively greater than for investment grade securities.

• Regulatory Impact Risk: Certain financial instruments are subject to extensive government regulation, which may change unexpectedly and frequently, and may impact a portfolio significantly.

• Short Sale Risk: A short sale involves the risk that the price at which the portfolio purchases a security to replace the borrowed security may be higher than the price that the portfolio sold the security, resulting in a loss to the portfolio. Such loss is theoretically unlimited. Short sales also involve certain costs and may expose the portfolio to leverage risk.

• U.S. Government Securities Risk: Not all U.S. government securities are backed or guaranteed by the U.S. government and different U.S. government securities are subject to varying degrees of credit risk. There is risk that the U.S. government will not provide financial support to U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law. 

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

• Non-Diversification Risk: An Underlying Portfolio that is classified as non-diversified may invest a greater percentage of its assets in a single issuer or a fewer number of issuers than a diversified portfolio. This increases potential price volatility and the risk that its value could go down because of the poor performance of a single investment or a small number of investments.

Portfolio Optimization Aggressive-Growth Portfolio | Class I

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.10%

^[1]

Service fee

rr_Component1OtherExpensesOverAssets

0.20%

^[1]

Other expenses

rr_OtherExpensesOverAssets

0.01%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.78%

^[1]

Total annual operating expenses

rr_ExpensesOverAssets

1.09%

^[1]

Less fee waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[1],[3]

Total annual operating expenses after fee waiver

rr_NetExpensesOverAssets

0.99%

^[1]

1 year

rr_ExpenseExampleYear01

101

3 year

rr_ExpenseExampleYear03

337

5 year

rr_ExpenseExampleYear05

591

10 year

rr_ExpenseExampleYear10

1,320

1 year

rr_ExpenseExampleNoRedemptionYear01

101

3 year

rr_ExpenseExampleNoRedemptionYear03

337

5 year

rr_ExpenseExampleNoRedemptionYear05

591

10 year

rr_ExpenseExampleNoRedemptionYear10

1,320

[1] The expense information has been restated to reflect current fees.

[2] The investment adviser has contractually agreed to waive its management fee through April 30, 2014. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

[3] The investment adviser has contractually agreed to waive its management fee through April 30, 2013. The agreement will terminate: (i) if the investment advisory agreement is terminated or (ii) upon ninety days' prior written notice by the Fund.

XML

Document and Entity Information	12 Months Ended
	May 01, 2012
Risk/Return:
Document Type	Other
Document Period End Date	Dec. 31, 2011
Registrant Name	PACIFIC SELECT FUND
Central Index Key	0000813900
Amendment Flag	false
Document Creation Date	Sep. 28, 2012
Document Effective Date	Sep. 28, 2012
Prospectus Date	May 01, 2012

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	PACIFIC SELECT FUND
Prospectus Date	rr_ProspectusDate	May 01, 2012
Document Creation Date	dei_DocumentCreationDate	Sep. 28, 2012