The 2003–04 Mid-American Conference men's basketball season began with practices in October 2003, followed by the start of the 2003–04 NCAA Division I men's basketball season in November.
Conference play began in January 2004 and concluded in March 2004.
Western Michigan won the regular season title with a conference record of 15–3 by two games over second-place Kent State.
[2] The preseason poll was announced by the league office on October 23, 2003.
[3] Northern Illinois was picked by the media to win the West Division while Miami was tabbed as the favorite in the East.