The men's K-2 1000 metres event was a pairs kayaking event conducted as part of the Canoeing at the 1964 Summer Olympics programme on Lake Sagami, Japan.
Three semifinals, each with four kayakers, were held, with the top three in each heat to advance to the final and three more pairs eliminated.
The 16 crews first raced in two heats on 20 October.
The top three finishers from each of the heats advanced directly to the semifinals; two were eliminated due to not starting, and the remaining 8 teams were relegated to the repechage heats.
The top three finishers in each of the three semifinals (raced on 21 October) advanced to the final.