Abstract: A tailgate extender providing selective height adjustment of the tailgate so that conditions associated with particular loads of a pick-up truck bed may be properly and safely accommodated, composed generally of: a tailgate extension member having a planar configuration for being located adjacent the bed facing side of a tailgate wherein a lip is integrally formed therewith for being located adjacent the top of the tailgate; a plurality of guidance members connected with the bed facing side of the tailgate and slidably engaged with respect to the tailgate extension member; and a stop member for regulating slidable movement of the tailgate extension member relative to the tailgate. Left and right guidance members are at a minimum provided and located, respectively, at the left and right ends of the tailgate extension member. The left and right guidance members serve as guidance for sliding movement of the tailgate extension member relative thereto and the tailgate.