EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (Nos. 333-27339, 333-88518, 333-133597, 333-140922, 333-150741, 333-154701 and 333-166975) and S-3 (No. 333-168438) of Barnes Group Inc. of our report dated February 18, 2011 relating to the consolidated financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/S/     PRICEWATERHOUSECOOPERS LLP

PricewaterhouseCoopers LLP

Hartford, Connecticut

February 18, 2011