2000 World Junior Championships in Athletics – Men's 400 metres hurdles

The men's 400 metres hurdles event at the 2000 World Junior Championships in Athletics was held in Santiago, Chile, at Estadio Nacional Julio Martínez Prádanos on 18, 19 and 21 October.

Final
21 October

Semifinals
19 October

Heats
18 October

Participation
According to an unofficial count, 29 athletes from 23 countries participated in the event. • 🇦🇺 australia (2)

• 🇧🇾 belarus (1)

• 🇧🇷 brazil (2)

• undefined (1)

• 🇨🇴 colombia (1)

• undefined (1)

• 🇫🇷 france (1)

• 🇩🇪 germany (2)

• undefined (1)

• 🇮🇹 italy (1)

• 🇯🇲 jamaica (1)

• 🇯🇵 japan (2)

• 🇰🇿 kazakhstan (1)

• 🇰🇪 kenya (1)

• 🇳🇴 norway (1)

• 🇵🇦 panama (1)

• 🇵🇱 poland (1)

• undefined (2)

• 🇪🇸 spain (2)

• 🇸🇪 sweden (1)

• 🇺🇦 ukraine (1)

• undefined (1)

• 🇺🇸 united states (1)