Airbag device and passenger protecting device

An airbag device, comprising:

• an inflator configured to generate gas at a time of a collision of a vehicle;
• and
• an airbag to which the gas is supplied, and that is configured to inflate and deploy from a seat rear side of an upper portion of a vehicle seat toward a seat front side,
• wherein the airbag has:
• a front-rear chamber having a pair of left and right front-rear extending portions formed in elongated tube shapes that are configured to pass by respective left and right sides of a head of a passenger seated in the vehicle seat and inflate and deploy toward the seat front side and diagonally downward, and a connecting portion connecting front end portions of the pair of front-rear extending portions in a seat left-right direction;
• and
• an airbag main body that inflates and deploys toward a side of the passenger at a seat rear side of the connecting portion later than the front-rear chamber, and that, at a time when the passenger is restrained, is compressed in a seat front-rear direction while stretching the front-rear chamber in the seat front-rear direction,
• wherein gas from the inflator is supplied to the airbag main body via a communication hole positioned at seat rear side of a seat left-right direction central portion of the connecting portion in an inflated and deployed state of the front-rear chamber, and
• wherein the connecting portion is sewn to the airbag main body at a sewn portion provided at the central portion of the connecting portion, and the communication hole that connects the connecting portion and the airbag main body is formed at an inner side of the sewn portion.