Trailer hitch for vehicles

The trailer coupling for motor vehicles has a ball neck bearing head (4) installed on a tumbling bearing (23) effecting movements around a point altering in space during the pivoting of the ball neck (3) from one end position to another. The tumbling bearing has a track control for the ball neck bearing head. The tumbling bearing has a ball head (22) which is installed by an interconnection of a bearing ring in a half-shell form housing of the ball neck bearing head.