Abstract: An improved truck cab shield (10) is provided for attachment to a pickup truck (12) in close protective relationship to the pickup's rear cab window (24). The shield (10) includes a base (18) which is secured to the bed side rails (30, 32) of the truck (12), as well as an upstanding barrier (20) supported by the base (18). In preferred forms, the barrier (18) is oriented at a non-vertical angle in close proximity to the window (24) through the height thereof. In preferred forms, the barrier (20) also includes upright, tubular elements (68, 70) allowing insertion of standards (74) which may be used to support traffic signs or the like. The barrier (20) preferably includes a peripheral frame (40) covered by wire mesh (63) and/or plexiglass panels (86).