METROPOLITAN SERIES    FUND,  INC. SUMMARY PROSPECTUS    May 1, 2011

MetLife Mid Cap Stock Index Portfolio

Class A, Class B, Class E and Class G Shares

Before you invest, you may want to review the Portfolio’s Prospectus, which contains more information about the Portfolio and its risks. You can find the Portfolio’s Prospectus and other information about the Portfolio (including the documents listed below) online at www.metlife.com/variablefunds. You can also get this information at no cost by calling 1-800-638-7732 or by sending an e-mail request to RCG@metlife.com. The Portfolio’s Prospectus and Statement of Additional Information, both dated May 1, 2011, and the financial statements of the Portfolio for the year ended December 31, 2010, including notes to the financial statements and financial highlights and the report of the Portfolio’s independent registered public accounting firm, which are included in the Annual Report of the Portfolio, are all incorporated by reference into this Summary Prospectus. This Summary Prospectus is intended for individuals who have purchased certain variable life insurance policies and variable annuity contracts (collectively, “Contracts”) from Metropolitan Life Insurance Company and its affiliates and is not intended for other investors.

Investment Objective

To equal the performance of the Standard & Poor’s MidCap 400 Composite Stock Price Index (“S&P MidCap 400 Index”).

Fees and Expenses of the Portfolio

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. These fees and expenses are based on the year ended December 31, 2010, and are expressed as a percentage of the Portfolio’s average daily net assets over that period. The table and the Example below do not reflect the fees, expenses or withdrawal charges imposed by the Contracts. See the Contract prospectus for a description of those fees, expenses and charges. If Contract expenses were reflected, the fees and expenses in the table and Example would be higher.

Shareholder Fees (fees paid directly from your investment)—None

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

	Class A		Class B		Class E		Class G
Management Fee		0.25%		0.25%		0.25%		0.25%
Distribution and Service (12b-1) Fees		None		0.25%		0.15%		0.30%
Other Expenses		0.06%		0.06%		0.06%		0.06%
Acquired Fund Fees and Expenses		0.01%		0.01%		0.01%		0.01%
Total Annual Portfolio Operating Expenses		0.32%		0.57%		0.47%		0.62%

Example

The following Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year, that you reinvest all of your dividends and that the Portfolio’s operating expenses remain the same. The Example also assumes the expiration of the fee waiver agreement after one year. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

	Class A		Class B		Class E		Class G
1 Year	$	33	$	58	$	48	$	63
3 Years	$	103	$	183	$	151	$	199
5 Years	$	180	$	318	$	263	$	346
10 Years	$	406	$	714	$	591	$	774

Portfolio Turnover

The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 22% of the average value of its portfolio.

Principal Investment Strategies

The S&P MidCap 400 Index consists of the common stock of approximately 400 mid capitalization companies. MetLife Investment Advisors Company, LLC (“MLIAC”), the subadviser to the Portfolio, manages the Portfolio by purchasing the common stock of all the companies in the S&P MidCap 400 Index. Although the Portfolio tries to mirror the performance of the S&P MidCap 400 Index, its performance will generally not exactly match the index because, among other things, the Portfolio incurs operating expenses. The S&P MidCap 400 Index is an unmanaged group of common stocks, and therefore does not have these expenses. As of December 31, 2010, the market capitalizations of companies in the S&P MidCap 400 Index ranged from $498 million to $10.1 billion.

MLIAC, under normal circumstances, invests at least 80% of the Portfolio’s net assets in stocks included in a particular mid capitalization stock index.

In addition to securities of the type contained in the S&P MidCap 400 Index, the Portfolio may invest in exchange traded funds and futures contracts based on the S&P MidCap 400 Index to simulate full investment in the index while retaining liquidity, to facilitate trading or to reduce transaction costs. MLIAC may rebalance the Portfolio due to, among other things, cash flows into and out of the Portfolio or changes in the S&P Mid Cap 400 Index.

Primary Risks

As with all mutual funds, there is no guarantee that the Portfolio will achieve its investment objective. You could lose money by investing in the Portfolio. An investment in the Portfolio through a Contract is not a deposit or obligation of, or guaranteed by, any bank, and is not federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board, or any other agency of the U.S. Government.

The value of your investment in the Portfolio may be affected by one or more of the following risks, which are described in more detail in “Primary Risks of Investing in the Portfolio” in the Prospectus, any of which could cause the Portfolio’s return or the price of its shares to decrease or could cause the Portfolio’s yield to fluctuate. Please note that there are many other circumstances that could adversely affect your investment and prevent the Portfolio from reaching its objective, which are not described here.

Market Risk.    The Portfolio’s share price can fall because of, among other things, a decline in the market as a whole, deterioration in the prospects for a particular industry or company, or changes in general economic conditions, such as prevailing interest rates and investor sentiment. Significant disruptions to the financial markets could adversely affect the liquidity and volatility of securities held by the Portfolio.

Market Capitalization Risk.    Investing primarily in issuers in one market capitalization category (large, medium or small) carries the risk that due to current market conditions that category may be out of favor with investors. Larger, more established companies may be unable to respond quickly to new competitive challenges or attain the high growth rate of successful smaller companies. Stocks of smaller companies may be more volatile than those of larger companies due to, among other things, narrower product lines, more limited financial resources and fewer experienced managers. In addition, there is typically less publicly available information about small capitalization companies, and their stocks may have a more limited trading market than stocks of larger companies.

Passive Management Risk.    In attempting to replicate the returns of an index, the Portfolio may be more susceptible to risks because it generally will not use any defensive strategies to mitigate its risk exposure. In addition, the Portfolio’s returns may deviate from the index it seeks to track as a result of, among other things, portfolio operating expenses, transaction costs and delays in investing cash.

Derivatives Risk.    The Portfolio may invest in derivatives. Derivatives can significantly increase the Portfolio’s exposure to market risk, credit and counterparty risk (the risk that an issuer or counterparty will default or become less creditworthy) and other risks. Derivatives may be illiquid and difficult to value. Because of their complex nature, some derivatives may not perform as intended. As a result, the Portfolio may not realize the anticipated benefits from a derivative it holds or it may realize losses. Derivative transactions may create investment leverage, which may increase the Portfolio’s volatility and may require the Portfolio to liquidate portfolio securities when it may not be advantageous to do so.

Investment Company and Exchange Traded Fund Risk.    An investment in an investment company or exchange-traded fund, or ETF, involves substantially the same risks as investing directly in the underlying securities. An investment company or ETF may not achieve its investment objective or execute its investment strategy effectively, which may adversely affect the Portfolio’s performance. The Portfolio must pay its pro rata portion of an investment company’s or ETF’s fees and expenses. Shares of a closed-end investment company or ETF may trade at a premium or discount to the net asset value of its portfolio securities.

Past Performance

The information below shows the volatility of the Portfolio’s returns from year to year and how the Portfolio’s average annual returns over time compare with those of a broad-based securities market index. Both the bar chart and table assume reinvestment of dividends and distributions. Note that the results in the bar chart and table do not include the effect of Contract charges. If these Contract charges had been included, performance would have been lower. As with all mutual funds, past returns are not a prediction of future returns. MLIAC was organized on October 3, 2006 to succeed to certain parts of the investment advisory business of its affiliate, Metropolitan Life Insurance Company (“Metropolitan Life”). In connection therewith, on April 30, 2007, the Portfolio changed its subadviser from Metropolitan Life to MLIAC. Performance information set forth below includes results prior to this change.

The bar chart below shows you the performance of the Portfolio’s Class A shares for each full calendar year since its inception and indicates how it has varied from year to year. The Portfolio can also experience short-term performance swings as indicated in the high and low quarter information at the bottom of the chart. The table below compares the Portfolio’s average annual compounded total returns for each class with index returns. For more information about indexes, please see “Index Description” in the Prospectus. It is not possible to invest directly in an index.

MetLife Mid Cap Stock Index Portfolio

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Year-by-Year Total Return as of December 31 of Each Year

Highest Quarter	3rd – 2009	19.93%
Lowest Quarter	4th – 2008	-25.47%

Average Annual Total Return as of December 31, 2010
	1 Year		5 Years		10 Years		Since Inception		Inception Date
Class A		26.28%		5.55%		6.84%		—	—
Class B		25.99%		5.30%		N/A		7.05%	1-2-01
Class E		26.08%		5.39%		N/A		6.97%	5-1-01
Class G		25.92%		N/A		N/A		36.58%	4-28-09
S&P MidCap 400 Index (reflects no deduction for mutual fund fees or expenses)		26.64%		5.74%		7.16%		—	—

Management

Adviser.    MetLife Advisers, LLC (“MetLife Advisers”) is the Portfolio’s investment adviser. For more information about the adviser, please see “Additional Information about Management—The Adviser” in the Prospectus and “Advisory Arrangements” in the Statement of Additional Information.

Subadviser.    MetLife Investment Advisors Company, LLC (the “Subadviser”) is the subadviser to the Portfolio. For more information about the subadviser, please see “Additional Information about Management—The Subadviser” in the Prospectus and “Advisory Arrangements” in the Statement of Additional Information.

Portfolio Managers.    Stacey Lituchy, Norman Hu and Mirsad Usejnoski are the managers of the Portfolio. Ms. Lituchy has been the senior manager of the Portfolio since 2004. Mr. Hu has been a manager of the Portfolio since 2003. Mr. Usejnoski has been a manager of the Portfolio since 2004. For additional information, please see “Additional Information about Management—The Subadviser” in the Prospectus and “Portfolio Managers” in the Statement of Additional Information.

Tax Information

For information regarding the tax consequences of Contract ownership, please see the prospectus for the relevant Contract.

Payments to Insurance Companies and Their Affiliates

The Portfolio is not sold directly to the general public but instead is offered as an underlying investment option for Contracts issued by insurance companies that are affiliated with the Portfolio and MetLife Advisers. As a result of these affiliations, the insurance companies may benefit more from offering the Portfolio as an investment option in the Contracts than offering other unaffiliated portfolios. The Portfolio and its related companies may also make payments to the sponsoring insurance companies (or their affiliates) for distribution and/or other services. The benefits to the insurance companies of offering the Portfolio over unaffiliated portfolios and these payments may be factors that the insurance companies consider in including the Portfolio as an underlying investment option in the Contracts and may create a conflict of interest. The prospectus for your Contract contains additional information about these payments.

MetLife Mid Cap Stock Index Portfolio

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