Abstract: A motorcycle loading and unloading device including a ramp having a pair of spaced, parallel ramp rails. The ramp is adapted to be connected with a pair of bed rails that are carried on the bed of a truck or on the bed of a trailer. A carriage member that includes a frame that supports a pair of wheels at each corner of the frame is provided to receive the front wheel of the motorcycle. One of the corner-mounted wheels is engageable with the ramp to serve as a ramp wheel and the other wheel is spaced laterally from the ramp wheel engageable with the bed rail and serves as a bed rail wheel. Positioned adjacent the bed rail wheels and the ramp rail wheels are laterally extending retainer members engageable with an underside of the respective ramp rail and the bed rail to prevent lateral tipping of the carriage as it moves along the ramp rails and the bed rails.