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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 WjAZPYR9ozs0QopRdbvAOgAViPf1Upe+qAVGQ2pWRlbGrX8mtFZPO30bJWer0Hw+
 MKxnDcAbnju7UsH9oq9O9g==

<SEC-DOCUMENT>0000897101-08-000522.txt : 20080307
<SEC-HEADER>0000897101-08-000522.hdr.sgml : 20080307
<ACCEPTANCE-DATETIME>20080307161404
ACCESSION NUMBER:		0000897101-08-000522
CONFORMED SUBMISSION TYPE:	5/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071231
FILED AS OF DATE:		20080307
DATE AS OF CHANGE:		20080307

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Woodworth John K
		CENTRAL INDEX KEY:			0001377945

	FILING VALUES:
		FORM TYPE:		5/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03285
		FILM NUMBER:		08674413

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		651 733 1110

	MAIL ADDRESS:	
		STREET 1:		3M CENTER - OFFICE OF GENERAL COUNSEL
		CITY:			ST. PAUL
		STATE:			MN
		ZIP:			55144-1000

	FORMER NAME:	
		FORMER CONFORMED NAME:	Woodward John K
		DATE OF NAME CHANGE:	20061011

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			3M CO
		CENTRAL INDEX KEY:			0000066740
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				410417775
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3M CENTER
		STREET 2:		BLDG. 220-11W-02
		CITY:			ST PAUL
		STATE:			MN
		ZIP:			55144-1000
		BUSINESS PHONE:		6517332204

	MAIL ADDRESS:	
		STREET 1:		3M CENTER
		STREET 2:		BLDG. 220-11W-02
		CITY:			ST. PAUL
		STATE:			MN
		ZIP:			55144-1000

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MINNESOTA MINING & MANUFACTURING CO
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>5/A
<SEQUENCE>1
<FILENAME>mmm081083woodworth_5aex.xml
<DESCRIPTION>FORM 5/A
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>5/A</documentType>

    <periodOfReport>2007-12-31</periodOfReport>

    <dateOfOriginalSubmission>2008-01-22</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0000066740</issuerCik>
        <issuerName>3M CO</issuerName>
        <issuerTradingSymbol>MMM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001377945</rptOwnerCik>
            <rptOwnerName>Woodworth John K</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3M CENTER</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ST. PAUL</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55144-1000</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VICE PRESIDENT CORP SC OPERTNS</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Non-Qualified Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>84.40</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-05-12</value>
            </exerciseDate>
            <expirationDate>
                <value>2014-05-09</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>16762</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16762</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Due to a vendor software malfunction, the reporting person's Form 5 filed on January 22, 2008, contained two errors on Table
 II. The Incentive Stock Option for 2,180 option shares @ $45.8500 had been exercised in 2007 and should not have been listed
 as a current holding. The number of option shares for a Non-Qualified Stock Option in the amount of 14,582 @ $84.400 was
 incorrect. The correct number of option shares is 16,762, a difference of 2,180 option shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: George Ann Biros For: John Karl Woodworth</signatureName>
        <signatureDate>2008-03-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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