Trailer hitch

The arrangement has a coupling ball (7) for accommodating a drag washer with a ball cup and a retaining device (1) that can be pivoted from a first to a second position and fixed in the first position by at least one fixing element. A control element (2) exerts first and second holding forces on the retaining device in the first and second positions and a trigger element (4) brings the retaining element from the second to the first position.