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 13, 2014, except with respect to our opinion on the consolidated financial statements insofar as it relates to the segment realignments discussed in Notes 3 and 15, which is as of May 15, 2014, relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in 3M Company’s Current Report on Form 8-K dated May 15, 2014.  We also consent to the reference to us as experts under the heading “Independent Registered Public Accounting Firm” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
Minneapolis, Minnesota

May 16, 2014