| Mode: | Basketball |
| Year: | 2003–04 |
| Prev Year: | 2002–03 |
| Next Year: | 2004–05 |
| Team: | Western Michigan Broncos |
| Conference: | Mid-American Conference |
| Division: | West Division |
| Short Conf: | MAC |
| Record: | 26–5 |
| Conf Record: | 15–3 |
| Head Coach: | Steve Hawkins |
| Hc Year: | 1st |
| Asst Coach1: | Clayton Bates |
| Ac1 Year: | 4th |
| Asst Coach2: | Larry Farmer |
| Asst Coach3: | James Holland |
| Stadium: | University Arena |
| Champion: | MAC West Division champions MAC regular season champions MAC tournament champions |
| Tourney: | NCAA tournament |
| Tourney Result: | round of 64 |
The 2003–04 Western Michigan Broncos men's basketball team represented Western Michigan University (WMU) during the 2003–04 NCAA Division I men's basketball season. The Broncos were Mid-American Conference (MAC) overall and West Division co-champions with Toledo, received the No. 1 seed in the conference tournament and defeated Toledo in the conference finals to receive the MAC's automatic berth into the 2014 NCAA Division I men's basketball tournament. WMU is led by 11th year head coach Steve Hawkins and play their home games at University Arena in Kalamazoo, Michigan.
WMU was given a No. 11 seed in the NCAA tournament and lost to No. 6 seeded Vanderbilt in the opening round, 71–59.[1]
|-!colspan=9 style=| Regular season
|-!colspan=9 style=| MAC tournament|-!colspan=9 style=| NCAA tournament