AIRBAG DEVICE

For example, even when an occupant is seated offset in a left-right direction, an airbag is reliably expanded and deployed. An airbag device 11 contains: an airbag 12 that protects at least a side portion 1b [sic] of a shoulder region, upper arm region, and chest region of an occupant 2 seated on a vehicle seat 1; and an inflator 13 that supplies gas to the airbag. The airbag 12 has a pair of side part protection chambers 12ca that are housed on at least both left and right sides of the vehicle seat. The side part protection chambers 12ca, when expanded and deployed, expand and deploy forward independently from both left and right sides of the vehicle seat 1. A pair of the inflators 13 are provided to allow gas to be supplied to each side part protection chamber, and the ignition timing of the inflators can be controlled separately.