485BPOS

Securities Act of 1933 Registration No. 333-139427

Investment Company Act of 1940 Registration No. 811-21991

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 x

o Pre-Effective Amendment No.  ______

x Post-Effective Amendment No.  64

and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 x

x Amendment No.  67

Fidelity Rutland Square Trust II

 (Exact Name of Registrant as Specified in Charter)

245 Summer Street, Boston, Massachusetts 02210

(Address of Principal Executive Offices)(Zip Code)

Registrant’s Telephone Number: 617-563-7000

John Hitt Secretary and Chief Legal Officer 245 Summer Street Boston, Massachusetts 02210 (Name and Address of Agent for Service) With copies to: John V. O’Hanlon, Esq. Dechert LLP One International Place, 40^th Floor 100 Oliver Street Boston, Massachusetts 02110

It is proposed that this filing will become effective immediately upon filing pursuant to paragraph (b).

EXHIBIT INDEX

Exhibit	Exhibit No.
XBRL Instance Document	EX-101.INS
XBRL Taxonomy Extension Schema Document	EX-101.SCH
XBRL Taxonomy Extension Calculation Linkbase Document	EX-101.CAL
XBRL Taxonomy Extension Definition Linkbase Document	EX-101.DEF
XBRL Taxonomy Extension Labels Linkbase Document	EX-101.LAB
XBRL Taxonomy Extension Presentation Linkbase Document	EX-101.PRE

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for the effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Post-Effective Amendment Nos. 64 and 67to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Boston, and Commonwealth of Massachusetts, on the 11th day of January 2018.

	Fidelity Rutland Square Trust II
	By	/s/Adrien E. Deberghes
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||		Adrien E. Deberghes, President

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

(Signature)		(Title)	(Date)
/s/Adrien E. Deberghes		President and Treasurer	January 11, 2018
Adrien E. Deberghes		(Principal Executive Officer)
/s/Howard J. Galligan III		Chief Financial Officer	January 11, 2018
Howard J. Galligan III		(Principal Financial Officer)
/s/Peter C. Aldrich	*	Trustee	January 11, 2018
Peter C. Aldrich
/s/Ralph F. Cox	*	Trustee	January 11, 2018
Ralph F. Cox
/s/Mary C. Farrell	*	Trustee	January 11, 2018
Mary C. Farrell
/s/Bruce T. Herring		Trustee	January 11, 2018
Bruce T. Herring
/s/Karen Kaplan	*	Trustee	January 11, 2018
Karen Kaplan
/s/Robert A. Lawrence	*	Trustee	January 11, 2018
Robert A. Lawrence
/s/Heidi L. Steiger	*	Trustee	January 11, 2018
Heidi L. Steiger

*	By:	/s/Megan C. Johnson
		Megan C. Johnson, attorney in fact

POWER OF ATTORNEY

We, the undersigned Trustees of Fidelity Rutland Square Trust II (the “Trust”), pursuant to the authority granted to the Trust’s Board of Trustees in Section 4.01(l) of Article IV of the Trust’s Trust Instrument dated March 8, 2006, hereby constitute and appoint Thomas C. Bogle, John V. O’Hanlon, Robert W. Helm, Megan C. Johnson, and Anthony H. Zacharski, each of them singly, our true and lawful attorneys-in-fact, with full power of substitution, and with full power to each of them, to sign for us and in our names in the appropriate capacities, all Registration Statements of the Trust on Form N-1A, or any successors thereto, any and all subsequent Amendments, Pre-Effective Amendments, or Post-Effective Amendments to said Registration Statements or any successors thereto, and any supplements or other instruments in connection therewith, and generally to do all such things in our names and on our behalf in connection therewith as said attorneys-in-fact deem necessary or appropriate, to comply with the provisions of the Securities Act of 1933 and the Investment Company Act of 1940, and all related requirements of the Securities and Exchange Commission. We hereby ratify and confirm all that said attorneys-in-fact or their substitutes may do or cause to be done by virtue hereof. This power of attorney is effective for all documents filed on or after December 6, 2017.

WITNESS our hands on this sixth day of December, 2017.

/s/Peter C. Aldrich	/s/Mary C. Farrell
Peter C. Aldrich	Mary C. Farrell
/s/Ralph F. Cox	/s/Robert A. Lawrence
Ralph F. Cox	Robert A. Lawrence
/s/Karen Kaplan	/s/Heidi L. Steiger
Karen Kaplan	Heidi L. Steiger

1

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 22, 2017
Registrant Name	dei_EntityRegistrantName	Fidelity Rutland Square Trust II
Central Index Key	dei_EntityCentralIndexKey	0001364924
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Dec. 22, 2017
Document Effective Date	dei_DocumentEffectiveDate	Dec. 26, 2017
Prospectus Date	rr_ProspectusDate	Dec. 26, 2017

XML

NF_05.31 Strategic Advisers Tax-Sensitive Short Duration Fund PRO-01 | Strategic Advisers® Tax-Sensitive Short Duration Fund

Fund Summary

Fund:
Strategic Advisers® Tax-Sensitive Short Duration Fund

Investment Objective

The fund seeks to provide a high level of after-tax income consistent with preservation of capital.

Fee Table

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder fees

Shareholder Fees {- Strategic Advisers® Tax-Sensitive Short Duration Fund}	NF_05.31 Strategic Advisers Tax-Sensitive Short Duration Fund PRO-01 Strategic Advisers® Tax-Sensitive Short Duration Fund USD ($)
(fees paid directly from your investment)	none

Annual Operating Expenses

(expenses that you pay each year as a % of the value of your investment)

Annual Operating Expenses {- Strategic Advisers® Tax-Sensitive Short Duration Fund}	NF_05.31 Strategic Advisers Tax-Sensitive Short Duration Fund PRO-01 Strategic Advisers® Tax-Sensitive Short Duration Fund Strategic Advisers Tax-Sensitive Short Duration Fund-Default
Management fee (fluctuates based on the fund's allocation among underlying funds and sub-advisers)	0.34%	[1],[2]
Distribution and/or Service (12b-1) fees	none
Other expenses	0.17%	[1]
Acquired fund fees and expenses	0.02%	[3]
Total annual operating expenses	0.53%
Fee waiver and/or expense reimbursement	0.25%	[2]
Total annual operating expenses after fee waiver and/or expense reimbursement	0.28%

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Sell All Shares

Expense Example {- Strategic Advisers® Tax-Sensitive Short Duration Fund}	NF_05.31 Strategic Advisers Tax-Sensitive Short Duration Fund PRO-01 Strategic Advisers® Tax-Sensitive Short Duration Fund Strategic Advisers Tax-Sensitive Short Duration Fund-Default USD ($)
1 year	$ 29
3 years	$ 97

Portfolio Turnover

The fund will not incur transaction costs, such as commissions, when it buys and sells shares of affiliated funds but may incur transaction costs when buying or selling non-affiliated funds and other types of securities (including non-affiliated exchange traded funds) directly (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance.

Principal Investment Strategies

• Normally investing primarily in U.S. dollar-denominated municipal money market securities and high quality investment-grade municipal debt securities whose interest is exempt from federal income tax (the "municipal strategy"). The Adviser may invest all of the fund's assets in municipal securities whose interest is subject to the federal alternative minimum tax.

• Potentially investing in taxable money market securities when after-tax yields are viewed as advantageous, taking into account the highest federal tax rates applicable to investment income of individuals (together with the municipal strategy, the “tax-sensitive” strategy) or for liquidity purposes.

• Normally maintaining a dollar-weighted average maturity of three years or less.

• Allocating assets across different market sectors and maturities.

• Potentially investing more than 25% of total assets in municipal securities that finance similar types of projects.

• Engaging in transactions that have a leveraging effect on the fund, including investments in derivatives - such as swaps (interest rate, total return, and credit default) and futures contracts - and forward-settling securities, to adjust the fund's risk exposure.

• Implementing investment strategies by investing directly in securities through one or more managers (sub-advisers) or indirectly in securities through one or more other funds, referred to as underlying funds, which in turn invest directly in securities (as described below).

• Allocating assets among affiliated fixed-income funds (i.e., Fidelity^® funds) and non-affiliated fixed-income funds that participate in Fidelity's FundsNetwork^®, and non-affiliated exchange traded funds (ETFs) (collectively, underlying funds) and sub-advisers.

• Allocating assets among underlying funds and sub-advisers with reference to the interest rate risk of the Bloomberg Barclays Municipal Bond 1 Year (1-2 Y) Index (25%) and the iMoneyNet℠ Tax-Free National Retail Money Market Average (75%).

• Allocating assets among underlying funds using proprietary fundamental and quantitative fund research, considering factors including fund performance, a fund manager's experience and investment style, fund company infrastructure, and fund characteristics such as expense ratio, asset size, and portfolio turnover.

• Allocating assets among sub-advisers considering factors including, but not limited to, a sub-adviser's investment approach, the characteristics of a sub-adviser's typical investment portfolio, and a sub-adviser's performance patterns in different market environments.

• Investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).

• Analyzing the credit quality of the issuer, the issuer's potential for success, the credit, currency and economic risks of the security and its issuer, security-specific features, current and potential future valuation, and trading opportunities to select investments.

Pursuant to an exemptive order granted by the Securities and Exchange Commission (SEC), Strategic Advisers, Inc. (Strategic Advisers) is permitted, subject to the approval of the Board of Trustees, to enter into new or amended sub-advisory agreements with one or more unaffiliated sub-advisers without obtaining shareholder approval of such agreements. Subject to oversight by the Board of Trustees, Strategic Advisers has the ultimate responsibility to oversee the fund’s sub-advisers and recommend their hiring, termination, and replacement. In the event the Board of Trustees approves a sub-advisory agreement with a new unaffiliated sub-adviser, shareholders will be provided with information about the new sub-adviser and sub-advisory agreement.

Principal Investment Risks

• Multiple Sub-Adviser Risk. Separate investment decisions and the resulting purchase and sale activities of the fund's sub-advisers might adversely affect the fund's performance or lead to disadvantageous tax consequences.

• Investing in Other Funds. Regulatory restrictions may limit the amount that one fund can invest in another, which means that the fund's manager may not be able to invest as much as it wants to in some other funds. The fund bears all risks of investment strategies employed by the underlying funds, including the risk that the underlying funds will not meet their investment objectives.

• Municipal Market Volatility. The municipal market is volatile and can be significantly affected by adverse tax, legislative, or political changes and the financial condition of the issuers of municipal securities.

• Interest Rate Changes. Interest rate increases can cause the price of a debt or money market security to decrease.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease.

• Leverage Risk. Leverage can increase market exposure, magnify investment risks, and cause losses to be realized more quickly.

• Investing in ETFs. ETFs may trade in the secondary market at prices below the value of their underlying portfolios and may not be liquid. ETFs that track an index are subject to tracking error and may be unable to sell poorly performing assets that are included in their index or other benchmark.

• Quantitative Investing. Securities selected using quantitative analysis can perform differently from the market as a whole as a result of the factors used in the analysis, the weight placed on each factor, and changes in the factors' historical trends.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in the fund will fluctuate. You could lose money by investing in the fund.

Performance

Performance history will be available for the fund after the fund has been in operation for one calendar year.

[1] Based on estimated amounts for the current fiscal year.

[2] Strategic Advisers, Inc. (Strategic Advisers) has contractually agreed that the fund's maximum aggregate annual management fee will not exceed 0.55% of the fund's average daily net assets. In addition, Strategic Advisers has contractually agreed to waive a portion of the fund's management fee in an amount equal to 0.25% of the fund's average daily net assets. This arrangement will remain in effect through September 30, 2020. Strategic Advisers may not terminate this arrangement without the approval of the Board of Trustees.

[3] Acquired fund fees and expenses based on estimated amounts for the current fiscal year.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

Fidelity Rutland Square Trust II

Prospectus Date

rr_ProspectusDate

Dec. 26, 2017

NF_05.31 Strategic Advisers Tax-Sensitive Short Duration Fund PRO-01 | Strategic Advisers® Tax-Sensitive Short Duration Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary

Fund:
Strategic Advisers® Tax-Sensitive Short Duration Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide a high level of after-tax income consistent with preservation of capital.

Expense [Heading]

rr_ExpenseHeading

Fee Table

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Operating Expenses

(expenses that you pay each year as a % of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

September 30, 2020

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund will not incur transaction costs, such as commissions, when it buys and sells shares of affiliated funds but may incur transaction costs when buying or selling non-affiliated funds and other types of securities (including non-affiliated exchange traded funds) directly (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance.

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

Based on estimated amounts for the current fiscal year.

Acquired Fund Fees and Expenses, Based on Estimates [Text]

rr_AcquiredFundFeesAndExpensesBasedOnEstimates

Acquired fund fees and expenses based on estimated amounts for the current fiscal year.

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Sell All Shares

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Normally investing primarily in U.S. dollar-denominated municipal money market securities and high quality investment-grade municipal debt securities whose interest is exempt from federal income tax (the "municipal strategy"). The Adviser may invest all of the fund's assets in municipal securities whose interest is subject to the federal alternative minimum tax.

• Potentially investing in taxable money market securities when after-tax yields are viewed as advantageous, taking into account the highest federal tax rates applicable to investment income of individuals (together with the municipal strategy, the “tax-sensitive” strategy) or for liquidity purposes.

• Normally maintaining a dollar-weighted average maturity of three years or less.

• Allocating assets across different market sectors and maturities.

• Potentially investing more than 25% of total assets in municipal securities that finance similar types of projects.

• Engaging in transactions that have a leveraging effect on the fund, including investments in derivatives - such as swaps (interest rate, total return, and credit default) and futures contracts - and forward-settling securities, to adjust the fund's risk exposure.

• Implementing investment strategies by investing directly in securities through one or more managers (sub-advisers) or indirectly in securities through one or more other funds, referred to as underlying funds, which in turn invest directly in securities (as described below).

• Allocating assets among affiliated fixed-income funds (i.e., Fidelity^® funds) and non-affiliated fixed-income funds that participate in Fidelity's FundsNetwork^®, and non-affiliated exchange traded funds (ETFs) (collectively, underlying funds) and sub-advisers.

• Allocating assets among underlying funds and sub-advisers with reference to the interest rate risk of the Bloomberg Barclays Municipal Bond 1 Year (1-2 Y) Index (25%) and the iMoneyNet℠ Tax-Free National Retail Money Market Average (75%).

• Allocating assets among underlying funds using proprietary fundamental and quantitative fund research, considering factors including fund performance, a fund manager's experience and investment style, fund company infrastructure, and fund characteristics such as expense ratio, asset size, and portfolio turnover.

• Allocating assets among sub-advisers considering factors including, but not limited to, a sub-adviser's investment approach, the characteristics of a sub-adviser's typical investment portfolio, and a sub-adviser's performance patterns in different market environments.

• Investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds).

• Analyzing the credit quality of the issuer, the issuer's potential for success, the credit, currency and economic risks of the security and its issuer, security-specific features, current and potential future valuation, and trading opportunities to select investments.

Pursuant to an exemptive order granted by the Securities and Exchange Commission (SEC), Strategic Advisers, Inc. (Strategic Advisers) is permitted, subject to the approval of the Board of Trustees, to enter into new or amended sub-advisory agreements with one or more unaffiliated sub-advisers without obtaining shareholder approval of such agreements. Subject to oversight by the Board of Trustees, Strategic Advisers has the ultimate responsibility to oversee the fund’s sub-advisers and recommend their hiring, termination, and replacement. In the event the Board of Trustees approves a sub-advisory agreement with a new unaffiliated sub-adviser, shareholders will be provided with information about the new sub-adviser and sub-advisory agreement.

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Multiple Sub-Adviser Risk. Separate investment decisions and the resulting purchase and sale activities of the fund's sub-advisers might adversely affect the fund's performance or lead to disadvantageous tax consequences.

• Investing in Other Funds. Regulatory restrictions may limit the amount that one fund can invest in another, which means that the fund's manager may not be able to invest as much as it wants to in some other funds. The fund bears all risks of investment strategies employed by the underlying funds, including the risk that the underlying funds will not meet their investment objectives.

• Municipal Market Volatility. The municipal market is volatile and can be significantly affected by adverse tax, legislative, or political changes and the financial condition of the issuers of municipal securities.

• Interest Rate Changes. Interest rate increases can cause the price of a debt or money market security to decrease.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease.

• Leverage Risk. Leverage can increase market exposure, magnify investment risks, and cause losses to be realized more quickly.

• Investing in ETFs. ETFs may trade in the secondary market at prices below the value of their underlying portfolios and may not be liquid. ETFs that track an index are subject to tracking error and may be unable to sell poorly performing assets that are included in their index or other benchmark.

• Quantitative Investing. Securities selected using quantitative analysis can perform differently from the market as a whole as a result of the factors used in the analysis, the weight placed on each factor, and changes in the factors' historical trends.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Unlike individual debt securities, which typically pay principal at maturity, the value of an investment in the fund will fluctuate. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

You could lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Performance history will be available for the fund after the fund has been in operation for one calendar year.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

Performance history will be available for the fund after the fund has been in operation for one calendar year.

NF_05.31 Strategic Advisers Tax-Sensitive Short Duration Fund PRO-01 | Strategic Advisers® Tax-Sensitive Short Duration Fund | Strategic Advisers Tax-Sensitive Short Duration Fund-Default

Risk/Return:

rr_RiskReturnAbstract

Management fee (fluctuates based on the fund's allocation among underlying funds and sub-advisers)

rr_ManagementFeesOverAssets

0.34%

^[1],[2]

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.17%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

^[3]

Total annual operating expenses

rr_ExpensesOverAssets

0.53%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.25%

^[2]

Total annual operating expenses after fee waiver and/or expense reimbursement

rr_NetExpensesOverAssets

0.28%

1 year

rr_ExpenseExampleYear01

$ 29

3 years

rr_ExpenseExampleYear03

$ 97

[1] Based on estimated amounts for the current fiscal year.

[2] Strategic Advisers, Inc. (Strategic Advisers) has contractually agreed that the fund's maximum aggregate annual management fee will not exceed 0.55% of the fund's average daily net assets. In addition, Strategic Advisers has contractually agreed to waive a portion of the fund's management fee in an amount equal to 0.25% of the fund's average daily net assets. This arrangement will remain in effect through September 30, 2020. Strategic Advisers may not terminate this arrangement without the approval of the Board of Trustees.

[3] Acquired fund fees and expenses based on estimated amounts for the current fiscal year.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Fidelity Rutland Square Trust II
Prospectus Date	rr_ProspectusDate	Dec. 26, 2017
Document Creation Date	dei_DocumentCreationDate	Dec. 22, 2017