Abstract: Base plate structure is provided for overlying and securement to the floor of interior of the rear trunk area of a passanger vehicle and a tubular standard has its lower end supported from and anchored relative to a central plan area of the base plate structure. Inclined braces are spaced about the standard and have their upper ends anchored relative to the upper end portion of the standard and their lower ends anchored relative to portions of the base plate structure spaced outwardly from and about the lower end portion of the standard. The upper terminal end of the standard projects above the upper ends of the inclined braces and may project through an opening provided in the horizontal body portion of the associated vehicle disposed forward of the forward marginal edge of the trunk lid thereof and rearward of the lower marginal edge of the rear window of the vehicle. A hitch ball is provided and includes a depending stem downwardly telescoped into and releasably secured within the standard.