The UCI Track Cycling World Championships – Men's 1 km Time Trial is the world championship in the track cycling 1 kilometre time trial event for men, held annually at the UCI Track Cycling World Championships.
The event is widely known simply as 'the kilo', and until 2024 was ridden only by men.
Arnaud Tournant and François Pervis of France, Chris Hoy of Great Britain, Stefan Nimke of Germany and Jeffrey Hoogland of the Netherlands share the record of most wins with four each.
However, after it was removed from the 2008 Summer Olympics cycling programme, some cyclists, such as Hoy, decided to concentrate on other events instead.
The event was first held at the world championships in 1966, until 1993 it was an amateurs race.