The 2004 MAC men's basketball tournament, a part of the 2003-04 NCAA Division I men's basketball season, took place from March 8–13 at Gund Arena in Cleveland.
Its winner received the Mid-American Conference's automatic bid to the 2004 NCAA tournament.
Western Michigan, the MAC regular season winner, received the number one seed in the tournament.
Western Michigan defeated Kent State in the final.
Tournament MVP – Mike Williams, Western Michigan[15]