Airbag device for front passenger's seat

An airbag device for a front passenger's seat, comprising:

• an airbag door provided at a vertical direction intermediate portion that is formed curvingly so as to be convex toward a vehicle upper side and rear side between an upper portion and a lower portion at a region in front of a front passenger's seat of an instrument panel;
• an airbag that is provided in a folded-up state at a reverse side of the airbag door, and that, when the airbag receives a supply of gas, opens the airbag door and is inflated and expanded at an obverse side of the instrument panel;
• an inflator that is disc-shaped and is provided at the reverse side of the airbag door and supplies gas to the airbag;
• a rear side accommodating portion that has a rear side bottom wall portion that is provided at the reverse side of the airbag door and faces the airbag door side, and that accommodates a lower inflating portion, that is positioned at an obverse side of a lower portion of the instrument panel, at the airbag when inflation is completed;
• and
• a front side accommodating portion that has a front side bottom wall portion that is formed at a vehicle front side and upper side of the rear side bottom wall portion, and to which are fixed the inflator and a base portion at a general portion that is other than the lower inflating portion at the airbag, and that is inclined with respect to the rear side bottom wall portion such that a central axis of the inflator intersects a normal line of the rear side bottom wall portion further toward a vehicle upper side than the airbag door, and the front side accommodating portion, together with the rear side accommodating portion, structures a box-shaped case that is open at the airbag door side, and the front side accommodating portion accommodates the general portion of the airbag and the inflator.