STABILIZER

A stabilizer for an attachment device of a vehicle comprises a first adjusting element and a second adjusting element which are guided adjustably relative to one another along a longitudinal axis in order to vary the length of the stabilizer, a first connecting element on the first adjusting element for supporting the stabilizer against the vehicle, and a second connecting element on the second adjusting element for supporting the stabilizer against an element of the attachment device, the second connecting element being connected to the second adjusting element such that it can be rotated about the longitudinal axis via a screw connection for adjusting the length of the second adjusting element. The stabilizer further has a locking device, which is connected to the second adjusting element and the second connecting element, the second adjusting element and the second connecting element being connected to one another in a rotationally fixed manner in a locking position of the locking device.