Finswimming at the 2009 World Games – Men's 400 m surface

The men's 400 m surface competition in finswimming at the 2009 World Games took place on 23 July 2009 at the Kaohsiung Swimming Pool in Kaohsiung, Taiwan.

Competition format
A total of 15 athletes entered the competition. The best eight athletes from preliminary round qualifies to the final.