The Men's 400 metres hurdles event at the 2011 European Athletics U23 Championships was held in Ostrava, Czech Republic, at Městský stadion on 14, 15 and 16 July.
16 July 2011 / 16:15
Qualified: First 2 in each heat (Q) and 2 best performers (q) advance to the Final
15 July 2011 / 15:50
15 July 2011 / 15:56
15 July 2011 / 16:02
Qualified: First 4 in each heat (Q) and 4 best performers (q) advance to the Semifinals
14 July 2011 / 12:00
14 July 2011 / 12:07
14 July 2011 / 12:14
14 July 2011 / 12:21
14 July 2011 / 12:28
According to an unofficial count, 33 athletes from 20 countries participated in the event.