Trailer coupling with a force sensor

The coupling (10) has a coupling receiver attached to an external lateral ball-shaped coupling body (15) that is arranged in a free end of a coupling body carrier (13) by a turning clamp (31) and/or a sliding clamp, where the body carrier is fastened at a towing vehicle (12). The coupling body is movably mounted and/or elastically held relative to the coupling body carrier. A force sensor is arranged between the coupling body carrier and the coupling body for measuring force affecting the coupling body, where the carrier is arranged as a clutch arm.