The men's horizontal bar competition was one of eight events for male competitors in artistic gymnastics at the 1968 Summer Olympics in Mexico City. The event was held on 22, 24, and 26 October. There were 115 competitors from 27 nations, with nations in the team competition having up to 6 gymnasts and other nations entering up to 3 gymnasts. The event was won in a tie between Akinori Nakayama of Japan (the nation's third victory in the horizontal bar in four Games, tying Switzerland for most all-time) and Mikhail Voronin of the Soviet Union (the nation's second consecutive gold medal in the event, tying the United States for third-most all-time). Eizo Kenmotsu of Japan took bronze.