Registration No. 333-72561
                                                filed pursuant to Rule 424(b)(3)

                              PROSPECTUS SUPPLEMENT
                               Dated April 1, 1999
                     to the Prospectus dated March 15, 1999

                               CINTAS CORPORATION

                          16,343 shares of Common Stock


         Cintas  Corporation,  a  Washington  corporation,   has  prepared  this
Prospectus  Supplement to update certain information  included in its Prospectus
dated March 15,  1999  relating to 16,343  shares of Common  Stock,  without par
value.  These shares are being offered for sale by certain  shareholders  of the
Company.

         15,526 of the 16,343  shares of Common  Stock  owned by David Feder and
Mindy  Feder,  as joint  tenants,  included in the  Prospectus  are subject to a
pledge and security agreement in favor of Merrill Lynch. Following a transfer of
such shares to Merrill Lynch  pursuant to such a pledge and security  agreement,
such shares may be sold by Merrill Lynch pursuant to the Prospectus.