EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement on Form S-8 pertaining to the Amended and Restated Knoll, Inc. 2010 Stock Incentive Plan of Knoll, Inc. of our reports dated March 1, 2010, with respect to the consolidated financial statements and schedule of Knoll, Inc. included in its Annual Report (Form 10-K) for the year ended December 31, 2009, and the effectiveness of internal control over financial reporting of Knoll, Inc. filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Philadelphia, Pennsylvania

June 22, 2010