Exhibit 23.1

               CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS

     We have issued our report  dated  February 13, 2003 (except for Notes 3 and
14, as to which  the date is March  26,  2003),  accompanying  the  consolidated
financial statements included in the Annual Report of Xybernaut Corporation,  on
Form  10-K for the year  ended  December  31,  2002.  We hereby  consent  to the
incorporation  by  reference  of said report in the  Registration  Statement  of
Xybernaut Corporation on Form S-3 to be filed on or about April 1, 2003, and the
use of our name as it appears under the caption "Experts."


/s/ Grant Thornton LLP

Vienna, Virginia
April 1, 2003