The Men's 200 Individual Medley (or I.M.) event at the 2005 FINA World Aquatics Championships was swum 27 – 28 July 2005 in Montreal, Quebec, Canada. Preliminary and Semifinal heats were 27 July; the Final 28 July. The top-16 swimmers from the Prelims in the morning advanced to the 1 of 2 Seminfinal in the evening; the top-8 swimmers from the Semifinals then advanced to the Final the next evening. At the start of the event, the existing World (WR) and Championships (CR) records were: No new world or competition records were set during this competition.