AIRBAG DEVICE AND VEHICLE SEAT

The present invention is an airbag device installed in a vehicle seat having a seat cushion forming the seat surface and a seatback forming the backrest, a pair of inflators stowed in the left and right side portions of said seatback and generating expansion gas, and an airbag stowed in said seatback in a rolled or folded state and deployed by the expansion gas released from said inflators. The airbag is configured to include a pair of left and right side chambers that deploy from the side of the seatback toward the front and restrain movement of at least the waist to the shoulders of an occupant, and a connection part that connects the pair of side chambers and is positioned above the head of the occupant when the airbag is deployed.