The men's 100 metre backstroke competition at the 2006 Pan Pacific Swimming Championships took place on August 17 at the Saanich Commonwealth Place.

[4] This race consisted of two lengths of the pool, all in backstroke.

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

[1] The B final was held on August 17, at 19:24.

[2] The A final was held on August 17, at 19:24.