Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 10, 2009 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in 3M Companys Annual Report on Form 10-K for the year ended December 31, 2008. We also consent to the reference to us under the heading Experts in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Minneapolis, Minnesota
February 17, 2009