<SEC-DOCUMENT>0001140361-11-024876.txt : 20110504
<SEC-HEADER>0001140361-11-024876.hdr.sgml : 20110504
<ACCEPTANCE-DATETIME>20110504162144
ACCESSION NUMBER:		0001140361-11-024876
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20110502
FILED AS OF DATE:		20110504
DATE AS OF CHANGE:		20110504

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CINTAS CORP
		CENTRAL INDEX KEY:			0000723254
		STANDARD INDUSTRIAL CLASSIFICATION:	MEN'S & BOYS' FURNISHINGS, WORK CLOTHING, AND ALLIED GARMENTS [2320]
		IRS NUMBER:				311188630
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			0531

	BUSINESS ADDRESS:	
		STREET 1:		6800 CINTAS BLVD
		STREET 2:		P O BOX 625737
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45262
		BUSINESS PHONE:		5134591200

	MAIL ADDRESS:	
		STREET 1:		6800 CINTAS BOULEVARD
		STREET 2:		P O BOX 625737
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45262

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Summer Hill Partners, LLLP
		CENTRAL INDEX KEY:			0001519379
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-11399
		FILM NUMBER:		11810530

	BUSINESS ADDRESS:	
		STREET 1:		6487 CINTAS BOULEVARD
		STREET 2:		SUITE 120
		CITY:			MASON
		STATE:			OH
		ZIP:			45040
		BUSINESS PHONE:		513-459-1085

	MAIL ADDRESS:	
		STREET 1:		6487 CINTAS BOULEVARD
		STREET 2:		SUITE 120
		CITY:			MASON
		STATE:			OH
		ZIP:			45040
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2011-05-02</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000723254</issuerCik>
        <issuerName>CINTAS CORP</issuerName>
        <issuerTradingSymbol>CTAS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001519379</rptOwnerCik>
            <rptOwnerName>Summer Hill Partners, LLLP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6847 CINTAS BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 120</rptOwnerStreet2>
            <rptOwnerCity>MASON</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45040</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16736387</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Scott D. Farmer, on behalf of the General Partner</signatureName>
        <signatureDate>2011-05-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
