Patent ID: 7648157

Claim:
An airbag apparatus mounted on a vehicle comprising: an airbag; an airbag housing portion for housing the airbag folded in a predetermined configuration, said airbag housing portion having an airbag opening for allowing the airbag to be developed and expanded; an airbag cover for covering the airbag opening; a gas-supplying portion for supplying gas to the airbag to expand the airbag in a developing and expanding area when a motor vehicle accident occurs; and an airbag-holding member for holding a folded shape of the airbag while covering an external surface of a folded airbag housed in the airbag housing portion in a partitioned area partitioned by the airbag housing portion and the airbag cover, said airbag-holding member comprising a film sheet formed of a plurality of resin layers laminated together to have a bag shape wrapping around an entire external surface of the folded airbag, wherein the film sheet includes a heat-welding resin layer with a heat-welding characteristic, two pieces of the film sheets being arranged to face each other in a manner that each side provided with the resin layer with the heat-welding characteristic is disposed inside so that each of outer edge portions of the film sheets is joined by heat-welding at the resin layers with the heat-welding characteristic to form into the bag shape, and wherein one of the resin layers forming the film sheet disposed immediately under the airbag cover includes reduced-thickness portions forming tear lines, said reduced thickness portions having a depth within a limit of a wall thickness of said one of the resin layers without penetrating into a next layer.