AIR BAG DEVICE FOR REAR-END COLLISION

Both ends of a sack-like body (11) are fixed to fastening sections (13) provided in a pillar-like frame in the rearmost part of a vehicle, and the sack-like body (11) is housed along an air bag housing space in a portion of a roof (3). The sack-like body (11) is composed of a fabric-made article that shrinks longitudinally when extended widthwise. At the time of a rear-end collision, the air bag is inflated by gas supplied from an inflator (5), and turns into an inflated body, starting from a housed state in the air bag housing space, in such a way that both ends of the air bag are supported by the fastening sections (13), the inflated shape of the inflated body being restricted by the sack-like body (11). This inflated body constrains the head sections of vehicle cabin occupants who move rearward due to the rear-end collision.