AIR BAG AND AIR BAG DEVICE

Provided is an airbag configured so that, in the inflated state thereof, a recess is formed in a chest restraint area in the passenger facing surface of the airbag, and the portion of the airbag other than the recess has a large inflation thickness. A driver-side airbag is formed by sewing a front panel and a rear panel together. The rear panel is provided with a left tuck portion which extends from the upper left to the lower left, and a right tuck portion which extends from the upper right to the lower right. The tuck portions and increase the inflation thickness of the driver-side airbag . A recess is formed in a passenger chest restraint area in the driver-side airbag by a tether