Patent ID: 8894092

Claim:
An airbag device comprising: an airbag that is normally folded and is inflated and deployed in emergency; an inflator for supplying gas to the airbag; a retainer for fixing the airbag and the inflator; and an airbag cover for housing the airbag, wherein the airbag cover includes a plate portion that forms an interior surface of a vehicle and an inner case that is disposed on a back surface of the plate portion and that forms an inflation and deployment path of the airbag, wherein the inner case has a plurality of holding holes for holding the retainer, wherein the retainer has a bottom surface portion for supporting the airbag and the inflator, a side wall portion that is disposed at an outer periphery of the bottom surface portion and that has such a height that the bottom surface portion hardly receives a pressure of the airbag when the airbag is inflated and deployed, and engagement members that are disposed on the side wall portion and that are engageable with the holding holes, wherein a substantially entirety of the retainer is housed in the inner case when the engagement members are engaged with the holding holes, and the height of the side wall portion is set within a range in which the height does not exceed an upper end point of a line segment connecting a fixed point of the airbag located on the bottom surface portion corresponding to a lower end point of the line segment and a contact point of the airbag against the inner case corresponding to the line segment upper end point during inflation and deployment of the airbag.