A vehicle air bag apparatus including an air bag to be disposed anterior to an occupant seat of a vehicle, a peripheral wall portion that surrounds the air bag from outside, and an upper wall portion that closes an upper surface opening in the peripheral wall portion , the air bag being inflated and deployed outward through the upper surface opening , the vehicle air bag apparatus further comprising: at least one rib , disposed in a part of a portion at which an upper end portion of the peripheral wall portion is connected with the upper wall portion , for connecting the upper end portion of the peripheral wall portion with the upper wall portion ; and characterised in that : a decorative board is disposed to be joined to the upper wall portion , for covering a vehicle body, wherein the upper wall portion has a flange portion formed on an outer peripheral portion thereof, the flange portion extending outwardly, and the decorative board has an end edge overlapping from above the flange portion , wherein in a top view, the upper wall portion has a recessed portion and protruded portions formed at a front edge portion thereof, the recessed portion being recessed inwardly and the protruded portions being disposed on both sides of the recessed portion , the decorative board is disposed in the recessed portion , and the peripheral wall portion has a notch formed in an outer surface thereof at a portion inferior to the recessed portion and a notch formed in an inner surface thereof at portions inferior to the protruded portions . at least one rib , disposed in a part of a portion at which an upper end portion of the peripheral wall portion is connected with the upper wall portion , for connecting the upper end portion of the peripheral wall portion with the upper wall portion ; and characterised in that : a decorative board is disposed to be joined to the upper wall portion , for covering a vehicle body, wherein the upper wall portion has a flange portion formed on an outer peripheral portion thereof, the flange portion extending outwardly, and the decorative board has an end edge overlapping from above the flange portion , a decorative board is disposed to be joined to the upper wall portion , for covering a vehicle body, wherein the upper wall portion has a flange portion formed on an outer peripheral portion thereof, the flange portion extending outwardly, and the decorative board has an end edge overlapping from above the flange portion , wherein in a top view, the upper wall portion has a recessed portion and protruded portions formed at a front edge portion thereof, the recessed portion being recessed inwardly and the protruded portions being disposed on both sides of the recessed portion , the decorative board is disposed in the recessed portion , and the peripheral wall portion has a notch formed in an outer surface thereof at a portion inferior to the recessed portion and a notch formed in an inner surface thereof at portions inferior to the protruded portions . in a top view, the upper wall portion has a recessed portion and protruded portions formed at a front edge portion thereof, the recessed portion being recessed inwardly and the protruded portions being disposed on both sides of the recessed portion , the decorative board is disposed in the recessed portion , and the peripheral wall portion has a notch formed in an outer surface thereof at a portion inferior to the recessed portion and a notch formed in an inner surface thereof at portions inferior to the protruded portions . <EOS>