<SEC-DOCUMENT>0001140361-15-030167.txt : 20150806
<SEC-HEADER>0001140361-15-030167.hdr.sgml : 20150806
<ACCEPTANCE-DATETIME>20150806152848
ACCESSION NUMBER:		0001140361-15-030167
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20150804
FILED AS OF DATE:		20150806
DATE AS OF CHANGE:		20150806

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:			FARMER SCOTT D
		CENTRAL INDEX KEY:			0001189287

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-11399
		FILM NUMBER:		151032760
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4/A
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2015-08-04</periodOfReport>

    <dateOfOriginalSubmission>2014-07-29</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001189287</rptOwnerCik>
            <rptOwnerName>FARMER SCOTT D</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>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2014-07-28</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>78665</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>771232</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">This amendment is being filed to correct the number of restricted shares reported as granted in this transaction, which number the Issuer and the Reporting Person agree was over-reported in the original Form 4 by 13,918 shares.  This over-reporting was also reflected in the Reporting Person's subsequent Form 4 filings through August 5, 2015.</footnote>
        <footnote id="F2">Restricted shares granted pursuant to Cintas Corporation's 2005 Equity Compensation Plans.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Scott D. Farmer</signatureName>
        <signatureDate>2015-08-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
