-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 IYk42m2w6ItzBMFRjLQ6NpGDCxvv84LeP6zMzrWkqITgxqnWCd1/llaU9vkxwu8g
 34u2x6Gx2eMpqAaGFePzFA==

<SEC-DOCUMENT>0001179110-10-002307.txt : 20100208
<SEC-HEADER>0001179110-10-002307.hdr.sgml : 20100208
<ACCEPTANCE-DATETIME>20100208173731
ACCESSION NUMBER:		0001179110-10-002307
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100205
FILED AS OF DATE:		20100208
DATE AS OF CHANGE:		20100208

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TWINEM MARY J
		CENTRAL INDEX KEY:			0001265912

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24743
		FILM NUMBER:		10581917

	MAIL ADDRESS:	
		STREET 1:		5500 WAYZATA BLVD.
		STREET 2:		SUITE 1600
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55416

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BUFFALO WILD WINGS INC
		CENTRAL INDEX KEY:			0001062449
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-EATING PLACES [5812]
		IRS NUMBER:				311455915
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1228

	BUSINESS ADDRESS:	
		STREET 1:		5500 WAYZATA BOULEVARD
		STREET 2:		SUITE 1600
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55416
		BUSINESS PHONE:		6125939943

	MAIL ADDRESS:	
		STREET 1:		5500 WAYZATA BOULEVARD
		STREET 2:		SUITE 1600
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55416
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-02-05</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001062449</issuerCik>
        <issuerName>BUFFALO WILD WINGS INC</issuerName>
        <issuerTradingSymbol>BWLD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001265912</rptOwnerCik>
            <rptOwnerName>TWINEM MARY J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5500 WAYZATA BLVD.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1600</rptOwnerStreet2>
            <rptOwnerCity>MINNEAPOLIS</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55416</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive VP, CFO &amp; Treasurer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-02-05</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>45.90</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>72631</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Sale effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 19, 2009.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Erik J. Romslo, as Attorney-in-Fact for Mary J. Twinem</signatureName>
        <signatureDate>2010-02-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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