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Supplement to the

Fidelity^® Advisor Municipal Income Fund

A Fund of Fidelity Advisor Series II

Class A, Class T, Class B, Class C, and Institutional Class

STATEMENT OF ADDITIONAL INFORMATION

December 29, 2007

<R>The following information supplements similar information found in the "Management Contract" section on page 28.</R>

<R>Sub-Adviser - FMR U.K. On behalf of the fund, FMR has entered into a sub-advisory agreement with FMR U.K. Pursuant to the sub-advisory agreement, FMR may receive from the sub-adviser investment research and advice on issuers outside the United States (non-discretionary services) and FMR may grant the sub-adviser investment management authority and the authority to buy and sell securities if FMR believes it would be beneficial to the fund (discretionary services). FMR, and not the fund, pays the sub-adviser.</R>

<R>Sub-Advisers - FMR H.K. and FMR Japan. On behalf of the fund, FMR has entered into sub-advisory agreements with FMR H.K. and FMR Japan. Pursuant to the sub-advisory agreements, FMR may receive from the sub-advisers investment research and advice on issuers outside the United States (non-discretionary services) and FMR may grant the sub-advisers investment management authority and the authority to buy and sell securities if FMR believes it would be beneficial to the fund (discretionary services). FMR, and not the fund, pays the sub-advisers.</R>

HIM/HIMIB-08-02 October 30, 2008
1.872066.101

Supplement to the

Fidelity^® Advisor Strategic Income Fund

A Fund of Fidelity Advisor Series II

Class A, Class T, Class B, Class C, and Institutional Class

STATEMENT OF ADDITIONAL INFORMATION

April 10, 2008

The following information supplements similar information found in the "Management Contract" section beginning on page 34.

Sub-Adviser - FMR U.K. On behalf of the fund, FMR has entered into a sub-advisory agreement with FMR U.K. Pursuant to the sub-advisory agreement, FMR may receive from the sub-adviser investment research and advice on issuers outside the United States (non-discretionary services) and FMR may grant the sub-adviser investment management authority and the authority to buy and sell securities if FMR believes it would be beneficial to the fund (discretionary services). FMR, and not the fund, pays the sub-adviser.

The following information replaces similar information for Derek Young found in the "Management Contract" section beginning on page 34.

Derek Young and Joanna Bewick are the co-managers of Advisor Strategic Income and receive compensation for their services. As of April 30, 2008, portfolio manager compensation generally consists of a fixed base salary determined periodically (typically annually), a bonus, in certain cases, participation in several types of equity-based compensation plans, and, if applicable, relocation plan benefits. A portion of each portfolio manager's compensation may be deferred based on criteria established by FMR or at the election of the portfolio manager.

Each co-manager's base salary is determined by level of responsibility and tenure at FMR or its affiliates. Each co-manager's bonus is based on several components. The components of each co-manager's bonus are based on (i) the pre-tax investment performance of the portfolio manager's fund(s) and account(s) measured against a benchmark index (which may be a customized benchmark index developed by FMR) assigned to each fund or account, and (ii) how the portfolio manager allocates the assets of funds and accounts among their asset classes, which results in monthly impact scores, as described below. The pre-tax investment performance of the portfolio manager's fund(s) and account(s) is weighted according to the portfolio manager's tenure on those fund(s) and account(s) and the average asset size of those fund(s) and account(s) over the portfolio manager's tenure. Each component is calculated separately over the portfolio manager's tenure on those fund(s) and account(s) over a measurement period that initially is contemporaneous with the portfolio manager's tenure, but that eventually encompasses rolling periods of up to five years for the comparison to a benchmark index. Each co-manager also receives a monthly impact score for each month of his or her tenure as manager of a fund or account. The monthly impact scores are weighted according to the portfolio manager's tenure on his or her fund(s) and account(s) and the average asset size of those fund(s) and account(s) over his or her tenure. The bonus is based on the aggregate impact scores for applicable annual periods eventually encompassing periods of up to five years. A smaller, subjective component of each co-manager's bonus is based on the portfolio manager's overall contribution to management of FMR.

The portion of each co-manager's bonus that is linked to the investment performance of Advisor Strategic Income is based on the fund's pre-tax investment performance relative to the performance of the fund's customized benchmark index (described below), on which the fund's target asset allocation is based. The portion of each co-manager's bonus that is based on impact scores is based on how he or she allocates the fund's assets among the high yield, U.S. Government and investment grade, foreign developed markets, and emerging markets asset classes, which are represented by the components of the Strategic Income Composite Index. The components of the Strategic Income Composite Index and their relative weightings in Advisor Strategic Income's neutral mix are 40% Merrill Lynch U.S. High Yield Master II Constrained Index; 30% Lehman Brothers Government Index; 15% Citigroup Non-U.S. Group of 7 Index; and 15% JP Morgan Emerging Markets Bond Index Global. Each co-manager's bonus is based on the percentage of the fund actually invested in each asset class. The percentage overweight or percentage underweight in each asset class relative to the neutral mix is multiplied by the performance of the index that represents that asset class over the measurement period, resulting in a positive or negative impact score.

Each portfolio manager also is compensated under equity-based compensation plans linked to increases or decreases in the net asset value of the stock of FMR LLC, FMR's parent company. FMR LLC is a diverse financial services company engaged in various activities that include fund management, brokerage, retirement and employer administrative services. If requested to relocate their primary residence, portfolio managers also may be eligible to receive benefits, such as home sale assistance and payment of certain moving expenses, under relocation plans for most full-time employees of FMR LLC and its affiliates.

<R>SI/SIIB-08-04 October 30, 2008
1.869855.103</R>

A portfolio manager's compensation plan may give rise to potential conflicts of interest. Although investors in a fund may invest through either tax-deferred accounts or taxable accounts, a portfolio manager's compensation is linked to the pre-tax performance of the fund, rather than its after-tax performance. A portfolio manager's base pay tends to increase with additional and more complex responsibilities that include increased assets under management and a portion of the bonus relates to marketing efforts, which together indirectly link compensation to sales. When a portfolio manager takes over a fund or an account, the time period over which performance is measured may be adjusted to provide a transition period in which to assess the portfolio. The management of multiple funds and accounts (including proprietary accounts) may give rise to potential conflicts of interest if the funds and accounts have different objectives, benchmarks, time horizons, and fees as a portfolio manager must allocate his or her time and investment ideas across multiple funds and accounts. In addition, a fund's trade allocation policies and procedures may give rise to conflicts of interest if the fund's orders do not get fully executed due to being aggregated with those of other accounts managed by FMR or an affiliate. A portfolio manager may execute transactions for another fund or account that may adversely impact the value of securities held by a fund. Securities selected for other funds or accounts may outperform the securities selected for the fund. Portfolio managers may be permitted to invest in the funds they manage, even if a fund is closed to new investors. Trading in personal accounts, which may give rise to potential conflicts of interest, is restricted by a fund's Code of Ethics.

The following information supplements similar information found in the "Management Contract" section beginning on page 34.

The following table provides information relating to other accounts managed by Ms. Bewick as of April 30, 2008:

	Registered Investment Companies*	Other Pooled Investment Vehicles	Other Accounts
Number of Accounts Managed	5	none	none
Number of Accounts Managed with Performance-Based Advisory Fees	none	none	none
Assets Managed (in millions)	$ 19,284	none	none
Assets Managed with Performance-Based Advisory Fees (in millions)	none	none	none

* Includes Advisor Strategic Income ($6,349 (in millions) assets managed).

As of April 30, 2008, the dollar range of shares of Advisor Strategic Income beneficially owned by Ms. Bewick was none.

The following information replaces similar information for Brett Kozlowski found in the "Management Contract" section beginning on page 34.

William Irving manages the U.S. government bond sub-portfolio of Advisor Strategic Income and receives compensation for his services. As of April 30, 2008, portfolio manager compensation generally consists of a fixed base salary determined periodically (typically annually), a bonus, in certain cases, participation in several types of equity-based compensation plans, and, if applicable, relocation plan benefits. A portion of each portfolio manager's compensation may be deferred based on criteria established by FMR, or at the election of the portfolio manager.

Dr. Irving's base salary is determined by level of responsibility and tenure at FMR or its affiliates. The primary components of the portfolio manager's bonus are based on (i) the pre-tax investment performance of the portfolio manager's fund(s) and account(s) measured against a benchmark index assigned to each fund or account, and (ii) the investment performance of other FMR taxable bond funds and accounts. The pre-tax investment performance of the portfolio manager's fund(s) and account(s) is weighted according to his tenure on those fund(s) and account(s) and the average asset size of those fund(s) and account(s) over his tenure. Each component is calculated separately over the portfolio manager's tenure on those fund(s) and account(s) over a measurement period that initially is contemporaneous with his tenure, but that eventually encompasses rolling periods of up to three years for the comparison to a benchmark index. A smaller, subjective component of the portfolio manager's bonus is based on the portfolio manager's overall contribution to management of FMR. The portion of the portfolio manager's bonus that is linked to the investment performance of Advisor Strategic Income is based on the pre-tax investment performance of the portion of the fund's assets he manages measured against the Lehman Brothers Government Bond Index. The portfolio manager also is compensated under equity-based compensation plans linked to increases or decreases in the net asset value of the stock of FMR LLC, FMR's parent company. FMR LLC is a diverse financial services company engaged in various activities that include fund management, brokerage, retirement and employer administrative services. If requested to relocate their primary residence, portfolio managers also may be eligible to receive benefits, such as home sale assistance and payment of certain moving expenses, under relocation plans for most full-time employees of FMR LLC and its affiliates.

The portfolio manager's compensation plan may give rise to potential conflicts of interest. Although investors in the fund may invest through either tax-deferred accounts or taxable accounts, the portfolio manager's compensation is linked to the pre-tax performance of the fund, rather than its after-tax performance. The portfolio manager's base pay tends to increase with additional and more complex responsibilities that include increased assets under management and a portion of the bonus relates to marketing efforts, which together indirectly link compensation to sales. When a portfolio manager takes over a fund or an account, the time period over which performance is measured may be adjusted to provide a transition period in which to assess the portfolio. The management of multiple funds and accounts (including proprietary accounts) may give rise to potential conflicts of interest if the funds and accounts have different objectives, benchmarks, time horizons, and fees as the portfolio manager must allocate his time and investment ideas across multiple funds and accounts. In addition, a fund's trade allocation policies and procedures may give rise to conflicts of interest if the fund's orders do not get fully executed due to being aggregated with those of other accounts managed by FMR or an affiliate. The portfolio manager may execute transactions for another fund or account that may adversely impact the value of securities held by a fund. Securities selected for other funds or accounts may outperform the securities selected for the fund. Portfolio managers may be permitted to invest in the funds they manage, even if a fund is closed to new investors. Trading in personal accounts, which may give rise to potential conflicts of interest, is restricted by a fund's Code of Ethics.

The following table provides information relating to other accounts managed by Mr. Irving as of April 30, 2008:

	Registered Investment Companies*	Other Pooled Investment Vehicles	Other Accounts
Number of Accounts Managed	10	7	2
Number of Accounts Managed with Performance-Based Advisory Fees	none	none	1
Assets Managed (in millions)	$ 28,181	$ 7,150	$ 514
Assets Managed with Performance-Based Advisory Fees (in millions)	none	none	$ 506

* Includes assets of Advisor Strategic Income managed by Dr. Irving ($1,912 (in millions) assets managed).

As of April 30, 2008, the dollar range of shares of Advisor Strategic Income beneficially owned by Dr. Irving was none.

The following information replaces similar information found in the "Management Contract" section on page 37.

Sub-Portfolio/Central Fund	Manager(s)
Developing country bond (sub-portfolio)	David Simner and Andrew Weir
Floating Rate Central Fund	Eric Mollenhauer
Emerging market debt (sub-portfolio)	Jonathan Kelly
High income (sub-portfolio)	Mark Notkin
U.S. government bond (sub-portfolio)	William Irving