Patent ID: 7441802

Claim:
An airbag device having an inflator for generating gas and an airbag expandable by the gas, said airbag device comprising: a gas inflow port provided in the airbag through which the gas flows in, a vent hole provided in the airbag for discharging the gas flown in the airbag, a cloth-like piece connected to a vicinity of the vent hole at one end thereof, and to a vicinity of the gas inflow port at the other end thereof releasably, wherein said cloth-like piece does not close the vent hole in a state where the other end is retained, and closes the vent hole due to an internal pressure of the airbag in a state where the other end is released, a retaining device for retaining the other end of the cloth-like piece, and releasing means for releasing retention of the retaining device, wherein the retaining device has a retaining plate, and the releasing means implements releasing by forcibly deforming the retaining plate.