The 2004–05 Idaho Vandals men's basketball team represented the University of Idaho during the 2004–05 NCAA Division I men's basketball season.

Members of the Big West Conference, the Vandals were led by fourth-year head coach Leonard Perry and played their home games on campus at Cowan Spectrum in Moscow, Idaho.

The Vandals were 8–21 overall in the regular season and 6–12 in conference play, eighth in the standings.

[2][3] They met fifth seed UC Irvine in the first round of the conference tournament in Anaheim and lost to the Anteaters by thirteen points.

[4][5] This was Idaho's ninth and final season in the Big West and their overall record in the conference tourney was 1–7; they moved to the Western Athletic Conference (WAC) over the summer.