Athletics at the 1964 Summer Olympics – Men's 4 × 100 metres relay
The men's 4 × 100 metres relay was the shorter 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. 21 teams, for a total of 85 athletes, from 21 nations competed, with 1 team of 4 not starting in the first round. The first round and the semifinals were held on 20 October with the final on 21 October.