A shelving system for a cargo vehicle is provided. Free-standing substantially vertical upright support members not attached to the walls of the cargo area of a vehicle are secured at their bottom ends to the floor of the cargo area of a vehicle and are horizontally spaced apart. The top ends of the upright support members may be secured to ribs in the roof of the vehicle or to separate transverse support members parallel to the roof. Shelves are vertically adjustably attached to the upright members. The upright and/or transverse support members may be provided with telescoping portions so as to be adjustable in height/length.