The 2005–06 Montana Grizzlies basketball team represented the University of Montana during the 2004–05 NCAA Division I men's basketball season.

The Grizzlies, led by first-year head coach Larry Krystkowiak, played their home games at Dahlberg Arena and were members of the Big Sky Conference.

They finished the season 18–13, 9–5 in Big Sky play to finish tied for second place in the conference regular season standings.

Montana won the Big Sky Basketball tournament to earn the conference's automatic berth into the NCAA tournament.

16 seed in the West region, the Grizzlies lost to No.