2004–05 Louisiana–Lafayette Ragin' Cajuns men's basketball team

The 2004–05 Louisiana–Lafayette Ragin' Cajuns men's basketball team represented the University of Louisiana at Lafayette during the 2004–05 NCAA Division I men's basketball season. The Ragin' Cajuns, led by first-year head coach Robert Lee, played their home games at the Cajundome and were members of the Sun Belt Conference. They finished the season 20–11, 11–4 in Sun Belt play to finish in second place in the West division. They were champions of the Sun Belt Conference tournament to earn an automatic bid to the NCAA tournament where they lost in the first round to No. 4 seed and eventual Final Four NC State.

Schedule and results
!colspan=9 style=| Regular season

!colspan=9 style=| Sun Belt tournament

!colspan=9 style=| NCAA tournament