1999 IAAF World Indoor Championships – Men's 4 × 400 metres relay

The men's 4x400 metres relay event at the 1999 IAAF World Indoor Championships was held on March 6–7.

* Runners who participated in the heats only and received medals.

Qualification: First 2 teams of each heat (Q) and the next 2 fastest (q) advance to the final.