Clamping device (1) for a cycle (2) on a cycle carrier (3) fixable to a towing hook of a motor vehicle, comprising a post (4) which is placeable on this cycle carrier (3) and which is provided with clamping means (5,6) for clamping a cycle (2), wherein the clamping device (1) is placeable on a horizontal surface, the post (4) can be coupled releasably to the cycle carrier (3), and the clamping means (5,6) are adapted to clamp a cycle (2) in the clamping device (1) in a situation where the device is placed on a horizontal surface.