Patent ID: 7237798

Claim:
An airbag for rear-end collision of a vehicle, the vehicle having a roof panel and a roof headlining that covers the entire surface of the roof panel on a side facing a passenger compartment, wherein the airbag is accommodated in a space above the roof headlining while being folded in a state extending along a lateral direction of the vehicle, and when supplied with gas, the airbag is inflated and deployed to be laterally symmetrical in a part of the passenger compartment rearward of the rearmost seat, the airbag comprising: a supply port that permits gas to be supplied to the interior of the airbag, the supply port being located in a center of the lateral direction of the airbag; and a laterally symmetrical distribution section connected to the supply port at a center of the distribution section in the lateral direction, the distribution section including a cell connected to the supply port, wherein the cell is deployed and inflated in the space above the roof headlining to displace the roof headlining, thereby creating an opening through which the airbag extends into the passenger compartment, and wherein the distribution section distributes, through the cell, gas that has passed through the supply port to different parts in the airbag including end portions in the lateral direction of the vehicle.