2006 Big Ten baseball tournament

The 2006 Big Ten Conference baseball tournament was held at Ray Fisher Stadium on the campus of the University of Michigan in Ann Arbor, Michigan, from May 15 through 19. The top six teams from the regular season participated in the double-elimination tournament, the twenty fifth annual tournament sponsored by the Big Ten Conference to determine the league champion. won their seventh tournament championship and earned the Big Ten Conference's automatic bid to the 2006 NCAA Division I baseball tournament.

Format and seeding
The 2006 tournament was a 6-team double-elimination tournament, with seeds determined by conference regular season winning percentage only. Illinois earned the fifth seed over Purdue by tiebreaker. As in the previous four years, the top two seeds received a single bye, with the four lower seeds playing opening round games. The top seed played the lowest seeded winner from the opening round, with the second seed playing the higher seed. Teams that lost in the opening round played an elimination game.

Tournament
* - Indicates game required 12 innings.

All-Tournament Team
The following players were named to the All-Tournament Team.

Most Outstanding Player
Adam Abraham was named Most Outstanding Player. Abraham was a pitcher for Michigan.