Air-bag-door-equipped vehicle interior trim article and method for fabricating the same

In order to ensure the strength of an air bag door section 17 defined in an instrument panel main body 1 and reliably open the door section 17 upon activation of an air bag device 42, an inventive vehicle interior trim article includes: a back-up plate 20 integrally connected to the bottom face of the door section 17; and a frame body 22 for accommodating the air bag device 42, wherein the back-up plate 20 is integrally formed with the frame body 22 via a hinge section 24, and an extreme end 20b of the back-up plate 20 detachably abuts against a top-side end face 34 of the frame body 22. The back-up plate 20 and frame body 22 are molded so that the extreme end 20b of the back-up plate 20 is spaced apart from the top-side end face 34 of the frame body 22 by a predetermined distance.