Athletics at the 1979 Pan American Games – Men's 400 metres
The men's 400 metres sprint competition of the athletics events at the 1979 Pan American Games took place at the Estadio Sixto Escobar. The defending Pan American Games champion was Ronnie Ray of the United States. Records. Prior to this competition, the existing world and Pan American Games records were as follows: Results. All times shown are in seconds. Heats. Held on 11 July Semifinals. Held on 11 July Final. Held on 12 July