The men's 400 metre freestyle competition at the 2014 Pan Pacific Swimming Championships took place on August 23 at the Gold Coast Aquatic Centre.

[1][2] The last champion was Park Tae-Hwan of South Korea.

[3] This race consisted of eight lengths of the pool, with all eight being in the freestyle stroke.

[4] Prior to this competition, the existing world and Pan Pacific records were as follows: All times are in minutes and seconds.

[2] The A final was held on August 23, at 20:19.