1988 World Junior Championships in Athletics – Men's 4 × 400 metres relay

The men's 4x400 metres relay event at the 1988 World Junior Championships in Athletics was held in Sudbury, Ontario, Canada, at Laurentian University Stadium on 31 July.

Final
31 July

Heats
31 July

Participation
According to an unofficial count, 62 athletes from 15 countries participated in the event. • 🇦🇺 australia (5)

• 🇨🇦 canada (4)

• 🇨🇺 cuba (4)

• 🇪🇹 ethiopia (4)

• 🇫🇷 france (4)

• 🇮🇹 italy (4)

• 🇯🇲 jamaica (4)

• 🇯🇵 japan (5)

• 🇰🇪 kenya (4)

• undefined (4)

• 🇵🇱 poland (4)

• 🇪🇸 spain (4)

• undefined (4)

• 🇺🇸 united states (4)

• undefined (4)