Athletics at the 1964 Summer Olympics – Men's 4 × 400 metres relay
The men's 4 × 400 metres relay was the longer of the two men's relays on the Athletics at the 1964 Summer Olympics program in Tokyo. It was held on 20 October and 21 October 1964. 20 teams, for a total of 80 athletes, from 20 nations entered, with 3 teams of 4 not starting in the first round. The first round was held on 20 October with the final on 21 October.