From 1904 to 1960, a men's 100 metre backstroke was held instead. In 1964, only the 200 metres was held. Beginning in 1968 and ever since, both the 100 and 200 metre versions have been held.
From 1904 to 1960, a men's 100 metre backstroke was included in competitions. In 1964, only the 200 metres event was held. Since 1968, both the 100 and 200 metre versions have been part of the events.