The men's 400 metres hurdles event at the 2009 European Athletics U23 Championships was held in Kaunas, Lithuania, at S. Dariaus ir S. Girėno stadionas (Darius and Girėnas Stadium) on 16, 17, and 18 July.
Medalists
Results
Final
18 July
Semifinals
17 July
Qualified: first 3 each heat and 2 fastest to Final
Semifinal 1
Semifinal 2
Heats
16 July
Qualified: first 3 each heat and 4 best to Semifinals
Heat 1
Heat 2
Heat 3
Heat 4
Participation
According to an unofficial count, 32 athletes from 21 countries participated in the event.
(1) (1) (1) (1) (3) (3) (1) (1) (2) (1) (1) (1) (1) (3) (1) (1) (1) (3) (2) (1) (2)