Abstract: A hemispherical bumper plate that is positioned on a fifth wheel hitch in a manner that makes it impossible to inadvertently contact the protruding surface of the hitch itself is provided. The protective properties of the bumper plate are also enhanced by the use of an additional coating of rubber or other elastic material that softens any contact made with the bumper, further the bumper itself may be made of plastic, hard rubber or other suitable material as desired. The present invention is connected to the fifth wheel trailer by the use of a cylindrical locking tube which fits over the kingpin of the fifth wheel hitch and is held in place by a locking pin which passes through the tube and engages the kingpin. The locking tube also has a plurality of outwardly radiating support bars which connect to and support the bumper plate in the desired position to provide the maximum amount of protection for the fifth wheel hitch.