These are the official results of the Men's 4 × 400 metres event at the 1991 IAAF World Championships in Tokyo, Japan.

There were a total number of sixteen participating nations, with three qualifying heats and the final held on Sunday 1 September 1991.

Going into the meeting, the USA 4 × 400 metres team hadn't lost at a major championships in over seven years.

Kriss Akabusi, running the anchor leg paced off of the individual 400m Champion, Antonio Pettigrew, then dramatically overtook him on the home straight to win.

The result was the only time out of eight major championships over a twelve-year span that the USA team failed to win gold.