2008 World Junior Championships in Athletics – Men's 4 × 100 metres relay

The men's 4x100 metres relay event at the 2008 World Junior Championships in Athletics was held in Bydgoszcz, Poland, at Zawisza Stadium on 11 and 12 July.

Final
12 July

Heats
11 July

Participation
According to an unofficial count, 85 athletes from 21 countries participated in the event. • 🇦🇹 austria (4)

• 🇨🇦 canada (4)

• undefined (4)

• 🇨🇿 czech republic (4)

• 🇫🇷 france (4)

• 🇩🇪 germany (4)

• 🇮🇹 italy (4)

• 🇯🇲 jamaica (5)

• 🇯🇵 japan (4)

• undefined (4)

• 🇵🇱 poland (4)

• 🇷🇺 russia (4)

• 🇸🇳 senegal (4)

• undefined (4)

• 🇪🇸 spain (4)

• 🇸🇪 sweden (4)

• 🇹🇭 thailand (4)

• undefined (4)

• 🇹🇷 turkey (4)

• undefined (4)

• 🇺🇸 united states (4)