FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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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1. Name and Address of Reporting Person * BUCKLEY GEORGE W   2. Issuer Name and Ticker or Trading Symbol 3M CO [MMM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) CHAIRMAN OF THE BOARD & CEO (Last) (First) (Middle) 3M CENTER 3. Date of Earliest Transaction (Month/Day/Year) 12/06/2010 (Street) ST. PAUL, MN 55144-1000 4. If Amendment, Date Original Filed(Month/Day/Year) 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 Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 12/06/2010   M   132,808 (2) A $ 86.88 176,039 D   Common Stock 12/06/2010   F   56,710 (2) D $ 86.88 119,329 D   Common Stock 12/06/2010   M   10,797 (3) A $ 86.88 130,126 D   Common Stock 12/06/2010   F   4,611 (3) D $ 86.88 125,515 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Units

(1)

12/06/2010

M

132,808

(4)

(4)

Common Stock

132,808

$ 0

0

D

Restricted Stock Units

(1)

12/06/2010

M

10,797

(5)

(5)

Common Stock

10,797

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BUCKLEY GEORGE W 3M CENTER ST. PAUL, MN 55144-1000	X		CHAIRMAN OF THE BOARD & CEO

Signatures

George Ann Biros, attorney-in-fact for George W. Buckley		12/07/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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)	Distribution of shares as a result of vesting of a portion of the restricted stock units (56,710 shares withheld for taxes).
(3)	Distribution of shares as a result of vesting of a portion of the restricted stock units (4,611 shares withheld for taxes).
(4)	The terms of the initial award (157,808 restricted stock units) provided for vesting as follows: 25,000 restricted stock units on 12/31/2006 and 132,808 on 12/6/2010.
(5)	The terms of the initial award (50,000 restricted stock units) provided for vesting in five equal annual installments on the anniversary of the grant date, 12/6/2005.

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