2008 World Junior Championships in Athletics – Men's 400 metres

The men's 400 metres event at the 2008 World Junior Championships in Athletics was held in Bydgoszcz, Poland, at Zawisza Stadium on 8, 9 and 10 July.

10 July

9 July

8 July

According to an unofficial count, 58 athletes from 42 countries participated in the event.