2010 World Junior Championships in Athletics – Men's 400 metres hurdles

The men's 400 metres hurdles event at the 2010 World Junior Championships in Athletics was held in Moncton, New Brunswick, Canada, at Moncton Stadium on 21, 22 and 23 July.

Final
23 July

Semifinals
22 July

Heats
21 July

Participation
According to an unofficial count, 49 athletes from 38 countries participated in the event. • undefined (1)

• 🇦🇺 australia (1)

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• 🇧🇪 belgium (1)

• 🇧🇷 brazil (2)

• 🇨🇦 canada (2)

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• 🇨🇿 czech republic (1)

• 🇩🇴 dominican republic (1)

• 🇪🇪 estonia (1)

• 🇫🇷 france (2)

• 🇩🇪 germany (2)

• 🇮🇪 ireland (2)

• 🇮🇹 italy (2)

• 🇯🇲 jamaica (2)

• 🇯🇵 japan (1)

• 🇰🇿 kazakhstan (1)

• 🇰🇪 kenya (2)

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• 🇲🇽 mexico (2)

• 🇳🇿 new zealand (1)

• 🇳🇴 norway (1)

• 🇷🇴 romania (1)

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• 🇸🇳 senegal (1)

• 🇷🇸 serbia (1)

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• undefined (2)

• 🇪🇸 spain (1)

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• 🇹🇳 tunisia (1)

• 🇺🇦 ukraine (1)

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• 🇺🇸 united states (2)

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