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.