Patent ID: 7604250

Claim:
A method of assembling an airbag device including a folded airbag, an inflator having a substantially cylinder shape for supplying a gas to the airbag, and a case made of a sheet metal in which the airbag and the inflator are housed, and a retainer made of a sheet metal including a retaining part having a substantially cylindrical shape in which the inflator is provided and a bolt part protruding perpendicularly to an axial direction of the retaining part, comprising the steps of: housing the retainer in the airbag in a folded state such that the bolt part protrudes from the airbag; housing the airbag in the case; passing the bolt part through a passage hole formed on a fixing wall portion of the case; fastening a nut onto the bolt part to fix the retainer to the fixing wall portion, wherein the inflator is retained by the retainer substantially at the same time that the retainer is fixed to the fixing wall portion; and retaining the inflator only by a support projection formed on the fixing wall portion and an abutment portion in the retainer such that the support projection prevents the inflator from being in contact with an inner face of the retainer.