Advisory Board 10-K 2004 FY Annual report

Exhibit 23.1

CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in the following Registration Statements of The Advisory Board Company of our reports dated April 28, 2004, with respect to the consolidated financial statements and schedule of The Advisory Board Company included in the Annual Report on Form 10-K for the year ended March 31, 2004.

Registration Statement Number	Description
333-84422		S-8
333-104584		S-3
333-112712		S-3

/s/ ERNST & YOUNG LLP

Baltimore, Maryland
June 10, 2004