Patent ID: 8419048

Claim:
An airbag device installed into an airbag-installation panel including a lid portion configured to be torn and a lid-side peripheral wall portion provided to stand on an outer periphery of said lid portion, said airbag device comprising: an inflator disposed inside said lid portion with spacing from an outer periphery at a distal end of said lid-side peripheral wall portion and configured to generate gas; an airbag folded so as to be disposed between said lid portion and said inflator and configured to be inflated and deployed in a bag shape by the gas introduced from said inflator; and an outer bag formed of a sheet-like member to be sewn into a three-dimensional shape including an outer-bag-side bottom and an outer-bag-side peripheral wall portion provided on an outer periphery of said outer-bag-side bottom, said outer-bag-side bottom being secured to said inflator, said outer-bag-side peripheral wall portion surrounding said folded airbag, and while said airbag is being inflated and deployed, a part of said outer-bag-side peripheral wall portion is disposed so as to be sandwiched between said airbag being inflated and deployed and said lid-side peripheral wall portion, and a part of said outer-bag-side peripheral wall portion that is interposed between the outer periphery at the distal end of said outer-bag-side peripheral wall portion and said inflator is disposed so as to brace said airbag during inflation and deployment of said airbag in a radial direction.