Abstract: A trailer dolly arranged for receiving a trailer hitch thereto to permit ease and mobility of a trailer. A support platform includes a forward wheel pivotally mounted relative to the platform, with a plurality of rear wheels, with at least one of the wheels in operative communication with a drive motor. A trailer hitch ball is mounted projecting upwardly of the support platform to receive a trailer hitch thereon. A modification of the invention includes the trailer hitch ball mounted within a cylinder, with a piston reciprocatably mounted within the cylinder mounting the ball at its upper distal end to permit lifting of a trailer as required for its mobility about a support surface.