 Athletics at the 1988 Summer Olympics – Men's 400 metres hurdles

The men's 400 metres hurdles at the 1988 Summer Olympics in Seoul, South Korea had an entry list of 38 competitors, with five qualifying heats (38 runners) and two semifinals (16) before the final (8) took place on Sunday September 25, 1988.These were the standing World and Olympic records (in seconds) prior to the 1988 Summer Olympics.