3M CO — Director's Dealing 2007

Jul 18, 2007

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2007-07-16

Reporting Person: SMITH MARSCHALL (VICE PRESIDENT LEGAL)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3577	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Non-Qualified Stock Option (right to buy)	$90.87	2017-07-16	Common Stock (15000)		Direct

Footnotes

F1: As part of the reporting person's compensation, the reporting person was
granted a restricted stock unit award of 3,577 units. The units will vest
in 1/3 annual increments commencing 7/16/08 assuming continued employment.
Vesting is accelerated upon the termination of employment under certain
circumstances.

F2: As part of the reporting person's compensation, the reporting person was
granted 15,000 nonqualified options which vest in 1/3 annual increments
commencing 7/16/08 assuming continued employment. Vesting is accelerated
upon the termination of employment under certain circumstances.