ITW-2014.12.31-EX 23

We consent to the incorporation by reference in Registration Statement No. 333-183499 on Form S-3, Registration Statement Nos. 333-105731, 333-108088, 333-69542, 333-142627 and 333-145392 on Form S-8, and Registration Statement No. 333-163547 on Form S-4 of our report dated February 13, 2015, relating to the consolidated financial statements of Illinois Tool Works Inc. and Subsidiaries, and the effectiveness of Illinois Tool Works Inc.’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of Illinois Tool Works Inc. for the year ended December 31, 2014.