Height-adjustable trailer coupling

The trailer hitch (1) has a movable carrier (4) with a coupling element that is guided between the guide rails (2) by engagement of locking pins (5) with holes (3) in the rails. The locking pins are independently movable along the inner side end portions of the rails. The carrier is formed with two locking bolts which are independently adjustably relative to the locking pins between locking position and unlocking position so as to lock or unlock the carrier in the rails.