Ceiling mounted airbag device and passenger restraint device

A ceiling mounted airbag device comprising:

• an airbag including a first chamber, which is installed at an upper side of a ceiling of a vehicle cabin and is configured to rupture the ceiling by being supplied with gas from an inflator during a vehicle head-on collision and to be expanded and deployed at a front side of a passenger seated in a vehicle seat, and the airbag including a second chamber that is configured to be expanded and deployed toward the passenger by being supplied with the gas from the first chamber;
• and
• a tension member coupling the first chamber with a support section provided at an upper side of the ceiling, the tension member rupturing the ceiling and deploying accompanying expansion and deployment of the first chamber, and the tension member relatively pulling the first chamber toward an upper side at a rear side, in a vehicle front-rear direction, of the first chamber in a case in which the passenger, who begins to move toward a front side under inertia, is restrained by the second chamber.