The 2004 Big Sky Conference men's basketball tournament was held March 6–10 at Reese Court at the University of Eastern Washington in Cheney, Washington.
[1] Top-seeded Eastern Washington defeated Northern Arizona in the championship game, 71–59, to win their first Big Sky men's basketball tournament title.
EWU had lost the three previous conference championship games.
No new teams were added to the Big Sky prior to the 2003–04 season, leaving total membership at eight.
Only the top six teams from the regular season conference standings were invited to the tournament.