The 2004–05 Iowa State Cyclones men's basketball team represented Iowa State University during the 2004–05 NCAA Division I men's basketball season.

The Cyclones were coached by Wayne Morgan, who was in his 2nd season.

They played their home games at Hilton Coliseum in Ames, Iowa, and competed in the Big 12 Conference.

[2] They lost to Oklahoma State in the quarterfinals of the Big 12 tournament.

They received an at-large bid to the NIT tournament where they defeated Georgia, Florida State, Marquette and lost to Rutgers in the Final Four.