There is provided an airbag device for allowing a holding member to firmly hold an outer circumference part and a peripheral edge part of an airbag during the airbag assembling work and to reduce the assembling work time. The airbag device comprising a holding member (14) for holding an airbag (10) in a state as folded and contained therein, and pressing down a side face of the airbag (10) on the outer circumference thereof. The holding member (14) is made of a woven cloth, and an anticipated rupture part (14k) to be ruptured by a gas generated from an inflator (30) is formed at the position corresponding to the part of the airbag (10), inflating in the initial stage of the expansion thereof.