Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Hardgrove Ian F
 2. Date of Event Requiring Statement (Month/Day/Year)
05/01/2011		 3. Issuer Name and Ticker or Trading Symbol
3M CO [MMM]
(Last)
(First)
(Middle)
3M CENTER		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP, Marketing and Sales
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

ST. PAUL, MN 55144-1000		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 7,906
D
 
Common Stock 727
I
By 401k/paesop Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units   (2)   (2) Common Stock 2,374.833 $ 0 (1) D  
Restricted Stock Units   (3)   (3) Common Stock 1,594.6265 $ 0 (1) D  
Restricted Stock Units   (4)   (4) Common Stock 4,042 $ 0 (1) D  
Non-qualified Stock Option (Right to Buy) 05/15/2003 05/14/2012 Common Stock 6,908 $ 64.5 D  
Non-qualified Stock Option (Right to Buy) 05/14/2004 05/13/2013 Common Stock 16,590 $ 61.85 D  
Non-qualified Stock Option (Right to Buy) 05/12/2005 05/09/2014 Common Stock 16,762 $ 84.4 D  
Non-qualified Stock Option (Right to Buy) 05/10/2006 05/08/2015 Common Stock 10,922 $ 76.8 D  
Non-qualified Stock Option (Right to Buy) 05/09/2007 05/09/2016 Common Stock 8,898 $ 87.35 D  
Non-qualified Stock Option (Right to Buy) 05/08/2008 05/08/2017 Common Stock 8,744 $ 84.78 D  
Non-qualified Stock Option (Right to Buy) (5) 05/13/2009 05/13/2018 Common Stock 8,008 $ 77.18 D  
Non-qualified Stock Option (Right to Buy) (6) 02/09/2010 02/08/2019 Common Stock 11,100 $ 54.11 D  
Non-qualified Stock Option (Right to Buy) (7) 02/09/2011 02/07/2020 Common Stock 13,172 $ 78.72 D  
Non-qualified Stock Option (Right to Buy) (8) 02/08/2012 02/08/2021 Common Stock 9,000 $ 89.47 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Hardgrove Ian F
3M CENTER
ST. PAUL, MN 55144-1000		       VP, Marketing and Sales  

Signatures

/s/ George Ann Biros, attorney-in-fact for Ian F. Hardgrove 05/04/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Each restricted stock unit represents a contingent right to receive one share of 3M common stock.
(2) The restricted stock units will vest on 2-9-2012.
(3) The restricted stock units will vest in equal installments on each of the first three anniversaries of the grant date (2/9/2010).
(4) The restricted stock units will vest in equal installments on 9-1-2013 and 9-1-2015.
(5) This option became exercisable in equal installments on each of the first three anniversaries of the grant date (5/13/2008).
(6) This option became exercisable in equal installments on each of the first three anniversaries of the grant date (2/9/2009).
(7) This option became exercisable in equal installments on each of the first three anniversaries of the grant date (2/9/2010)
(8) This option becomes exercisable in equal installments on each of the first three anniversaries of the grant date (2/8/2011).

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