The 2005–06 NCAA Division I men's ice hockey season began on October 7, 2005 and concluded with the 2006 NCAA Division I men's ice hockey tournament's championship game on April 8, 2006 at the Bradley Center in Milwaukee, Wisconsin. This was the 59th season in which an NCAA ice hockey championship was held and is the 112th year overall where an NCAA school fielded a team.

The Dartmouth Big Green men's ice hockey team is a National Collegiate Athletic Association (NCAA) Division I college ice hockey program that represents Dartmouth College. The Big Green are a member of ECAC Hockey. They play at the Thompson Arena in Hanover, New Hampshire.