The men's single sculls event was a rowing event conducted as part of the Rowing at the 1964 Summer Olympics programme. It was held from 11 to 15 October at the Toda Rowing Course. There were 13 competitors from 13 nations, with each nation limited to a single boat in the event. The event was won by Vyacheslav Ivanov of the Soviet Union, his third consecutive victory in the event. Ivanov's three gold medals in the event remains tied for the best results for any individual single sculler ; only Ekaterina Karsten has more medals in (women's) single sculls, though she took only two golds along with a silver and a bronze. The second spot on the podium was also a repeat of 1960; Achim Hill of the United Team of Germany became the sixth man to win multiple single sculls medals by repeating as silver medalist. Bronze this time went to Gottfried Kottmann of Switzerland, that nation's first medal in the event since 1924.

Rowing at the 1964 Summer Olympics featured seven events, for men only.