The trailer coupling (10) has a bearing (12), which has a vehicle bearing part (13) and a coupling arm-bearing part that is mounted at the vehicle bearing part between a custom position and a non-usage position in a mobile manner. A coupling arm is arranged at the coupling arm-bearing part. The bearing has a restoring spring arrangement (78) that impinges a bearing retainer (25) and a bearing element (26) relative to each other towards a predetermined position.
