The men's 100 metre breaststroke competition of the swimming events at the 2013 Mediterranean Games took place on June 21 at the Mersin Olympic Swimming Pool in Mersin, Turkey.

[1] The race consisted of two lengths of the pool in breaststroke.

Prior to this competition, the existing world and Mediterranean Games records were as follows: All times are in minutes and seconds.

[2][3][4] [5]