-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 IXS/S/Fx+kUXEyHRZNXn5qJ1CTiTnVUVxd2BMSMrxg2nSLFVEap9UHDhzRflyuOZ
 X4AHr33ukhV6Y9swROkP+A==

<SEC-DOCUMENT>0000938447-06-000001.txt : 20060403
<SEC-HEADER>0000938447-06-000001.hdr.sgml : 20060403
<ACCEPTANCE-DATETIME>20060403134247
ACCESSION NUMBER:		0000938447-06-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060331
FILED AS OF DATE:		20060403
DATE AS OF CHANGE:		20060403

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WINMARK CORP
		CENTRAL INDEX KEY:			0000908315
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-MISCELLANEOUS RETAIL [5900]
		IRS NUMBER:				411622691
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1226

	BUSINESS ADDRESS:	
		STREET 1:		4200 DAHLBERG DRIVE
		CITY:			GOLDEN VALLEY
		STATE:			MN
		ZIP:			55422-4837
		BUSINESS PHONE:		6125208500

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GROW BIZ INTERNATIONAL INC
		DATE OF NAME CHANGE:	19930629

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			OLSON RONALD G
		CENTRAL INDEX KEY:			0000938447

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22012
		FILM NUMBER:		06732521

	BUSINESS ADDRESS:	
		STREET 1:		4200 DAHLBERG DRIVE
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55422
		BUSINESS PHONE:		6125208500

	MAIL ADDRESS:	
		STREET 1:		GROWN BIZ INTERNATIONAL INC
		STREET 2:		4200 DAHLBERG DRIVE
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55422-4837
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-03-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000908315</issuerCik>
        <issuerName>WINMARK CORP</issuerName>
        <issuerTradingSymbol>wina</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000938447</rptOwnerCik>
            <rptOwnerName>OLSON RONALD G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1630 NORTH RIDGE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WAYZATA,</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55391</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-03-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>23.15</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>985813</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Wife</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>35800</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trustee</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Ronald G. Olson</signatureName>
        <signatureDate>2006-04-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----