Athletics at the 1988 Summer Olympics - Men's 400 metre hurdles

The men's 400 metres hurdles at the 1988 Summer Olympics in Seoul, South Korea had an entrylist 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.

The following Olympic record was set during this competition.

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