| Mode: | Basketball |
| Year: | 2004–05 |
| Prev Year: | 2003–04 |
| Next Year: | 2005–06 |
| Team: | Niagara Purple Eagles |
| Conference: | Metro Atlantic Athletic Conference |
| Short Conf: | MAAC |
| Record: | 20–10 |
| Conf Record: | 13–5 |
| Hc Year: | 7th |
| Tourney Result: | Round of 64 |
The 2004–05 Niagara Purple Eagles men's basketball team represented Niagara University during the 2004–05 NCAA Division I men's basketball season. The Purple Eagles, led by seventh-year head coach Joe Mihalich, played their home games at the Gallagher Center in Lewiston, New York as members of the Metro Atlantic Athletic Conference. They finished the season 20–10, 13–5 in MAAC play to finish in first place. They defeated Iona and Rider to win the MAAC tournament and secure the conferences automatic bid to the NCAA Tournament as the No. 14 seed in the South region. The Purple Eagles were beaten by No. 3 seed Oklahoma, 84–67, in the opening round.[1]
Source[2]
|-!colspan=9 style=| Regular season
|-!colspan=9 style=| MAAC tournament|-!colspan=9 style=| NCAA tournamentSource[3]