The 2004 Mountain West Conference baseball tournament took place from May 26 through 29. All six of the league's teams met in the double-elimination tournament held at University of Nevada, Las Vegas's Earl Wilson Stadium. Third seeded UNLV won their second straight and second overall Mountain West Conference Baseball Championship with a championship game score of 6–3 and earned the conference's automatic bid to the 2004 NCAA Division I baseball tournament.
Seeding
The teams were seeded based on regular season conference winning percentage only. New Mexico claimed the second seed by winning the season series against UNLV.
Results
All-Tournament Team
The following players were named to the All-Tournament team.
Most Valuable Player
Matt Luca, a sophomore pitcher for the champion UNLV Rebels, was named the tournament Most Valuable Player.