SEAT-ATTACHED AIRBAG DEVICE AND METHOD FOR FOLDING AIRBAG

A seat-mounted airbag device including an airbag that includes a pair of front-rear chambers that, by being supplied with gas ejected from an inflator during a vehicle collision, are expanded and deployed to a seat front side by passing both left and right sides of a head of a passenger, and an airbag body that moves to a front side by passing between the head of the passenger and a ceiling in conjunction with expansion and deployment of the pair of front-rear chambers, and by being supplied with the gas from the pair of front-rear chambers, expands and deploys toward a rear side between the pair of front-rear chambers so as to be disposed at the front side of the passenger. The airbag includes a push structure that is provided at the rear side of the airbag body and that pushes the airbag body toward the seat front side.