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 *
  BUCKLEY GEORGE W
 2. Date of Event Requiring Statement (Month/Day/Year)
12/06/2005		 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)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
CHAIRMAN OF THE BOARD & CEO
 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 207,808 (1)
D
 

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
Non-Qualified Stock Option (right to buy) 12/06/2006 12/06/2015 Common Stock 250,000 (2) $ 78.15 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

By: George Ann Biros For: George William Buckley 12/09/2005
**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) As part of the reporting person's compensation, the reporting person was granted two restricted stock unit awards of 50,000 and 157,808 units. The units vest over time assuming the reporting person remains employed by the Company. Vesting is accelerated upon the termination of employment under certain circumstances. Prior to vesting, cash payments in lieu of dividends will be paid with respect to the 157,808 unit award, while additional restricted stock units will be granted in lieu of dividends with respect to the 50,000 unit award.
(2) As part of the reporting person's compensation, the reporting person was granted 250,000 nonqualified options which vest in 20% annual increments commencing 12/6/06 assuming continued employment. Vesting is accelerated upon the termination of employment under certain circumstances.

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