Athletics at the 2008 Summer Olympics – Women's 400 metres hurdles

The women's 400 metres hurdles at the 2008 Summer Olympics took place on 17–20 August at the Beijing National Stadium.

[2] All times are China Standard Time (UTC+8) Prior to this competition, the existing world record, Olympic record, and world leading time were as follows: The following new Olympic record was set during this competition.

The first three runners of each heat (Q) plus the next four overall fastest runners (q) qualified for the Semifinals.

Qualification: First 4 in each heat (Q) advance to the Final.

(OR = Olympic record; NR = National Record; PB = Personal Best; SB = Season Best.)