Swimming at the 1973 World Aquatics Championships – Men's 4 × 100 metre medley relay

The men's 4 × 100 metre medley relay competition of the swimming events at the 1973 World Aquatics Championships took place on September 9.

Records
Prior to the competition, the existing world and championship records were as follows.

The following records were established during the competition:

Heats
15 teams participated in 2 heats.

Final
The results of the final are below.