2004 World Junior Championships in Athletics – Men's 400 metres hurdles

The men's 400 metres hurdles event at the 2004 World Junior Championships in Athletics was held in Grosseto, Italy, at Stadio Olimpico Carlo Zecchini on 14, 15 and 16 July.

Final
16 July

Semifinals
15 July

Heats
14 July

Participation
According to an unofficial count, 30 athletes from 22 countries participated in the event. • 🇧🇪 belgium (1)

• 🇧🇷 brazil (1)

• undefined (2)

• undefined (1)

• 🇨🇺 cuba (1)

• 🇫🇮 finland (1)

• 🇫🇷 france (2)

• 🇭🇺 hungary (1)

• 🇮🇱 israel (1)

• 🇮🇹 italy (1)

• 🇯🇲 jamaica (2)

• 🇯🇵 japan (2)

• undefined (1)

• undefined (1)

• 🇷🇺 russia (1)

• undefined (2)

• 🇸🇳 senegal (1)

• undefined (2)

• 🇹🇷 turkey (1)

• undefined (2)

• 🇺🇸 united states (2)

• 🇻🇪 venezuela (1)