Patent ID: 7311324

Claim:
An airbag device for a front passenger's seat mounted on the instrument panel in front of the front passenger's seat, comprising: an airbag having an opening for admitting the inflation gas; an inflator that has a generally cylindrical shape and an outer circumferential part of an end portion of the inflator is provided with a plurality of gas discharge ports for discharging the inflation gas; a case for holding and housing the airbag folded and holding the inflator, the case having a bottom wall with an insert hole from which the end portion of the inflator having the gas discharge ports is inserted therein; and an annular retainer for attaching the airbag to the case by holding the opening peripheral edge of the airbag the retainer comprising: an annular base attached to the periphery of the insert hole of the case bottom wall while pressing the peripheral edge of the airbag opening onto the periphery of the insert hole of the bottom wall; and a cover wall extended from the base so as to block the pad of the airbag neighboring the opening peripheral edge held by the base from the gas discharge ports of the inflator, on which the mist contained in the inflation gas discharged from the gas discharge ports adhering, the cover wall comprising a mist growth prevention means to prevent the mist from forming mist agglomerates, wherein: the cover wall of the retainer is arranged in a generally square shape encircling the end portion of the inflator having the gas discharge ports; the cover wall is provided at four corners thereof with through portions penetrating the cover wall; the through portions constitute the mist growth prevention means; the retainer includes only one cover wall extending only from an outer edge of the base; the through portions formed at the four corners of the cover wall are recesses recessing from a top of the cover wall; and leading ends of the cover wall at four sides of the square shape extend straightly as viewed from above.