Abstract: A coupling apparatus for interconnecting two vehicles for relative pivotal movement including a hitch member adapted for attachment to one vehicle and having a ball hitch, and a coupler member adapted for attachment to a second vehicle and having a head for swivelly receiving the hitch ball. A slide block is mounted in a guide member on the hitch member for movement crosswise of the centerline of the hitch member and has a notch for receiving a nose on the coupler member so that angular movement of the coupler member about the axis of the hitch ball causes sliding movement of the slide block. Movement of the slide block along the guide is retarded by a frictional brake pad and a selectively operable lever is provided to retract the guide member and slide block away from the hitch ball to facilitate coupling and uncoupling.