Patent ID: 7845680

Claim:
An airbag including a front panel disposed on an occupant side, and a rear panel disposed on a side opposite to the occupant side, in which in the front panel and the rear panel, peripheral edge portions thereof are connected to each other, and an opening for use in a gas-generator is provided at a center of the rear panel, and a halfway portion disposed halfway between a respective center portion and a peripheral edge portion of the front and rear panels, said halfway portion being disconnectably connected by means of circular line-shaped connecting portions extending in a peripheral direction, and the line-shaped connecting portions being provided in a plurality and arranged approximately concentrically, and the line shaped connecting portions having a communicating portion allowing an inner periphery side and an outer periphery side of the line shaped connecting portions to communicate with each other, the communication portions partially interrupting a connection of the front panel and the rear panel, said communicating portions provided in an extending direction of each of the line-shaped connecting portions at the halfway portion, wherein the individual communicating portions are positioned on sides opposite to each other while a center of the airbag is sandwiched between the individual line-shaped connecting portions, wherein the line-shaped connecting portions are provided next to each other in a radial direction.