Airbag apparatus, passenger protection system, and vehicle

A passenger protection system comprising:

• a gas supply mechanism for supplying gas;
• a single airbag mounted on a vehicle, and deployed and inflated by supply of the gas from the gas supply mechanism;
• a detector for detecting information relating to an occurrence of a vehicle accident;
• a controller for controlling the gas supply mechanism, the controller being capable of activating the gas supply mechanism based on a result detected by the detector;
• an operating member for steering the vehicle, located on a front side of the vehicle with respect to a driving passenger;
• and
• a pressure receiving section located on the front side of the vehicle with respect to the operating member,
• wherein the single airbag comprises a first airbag section for constraining the driving passenger by being deployed and inflated in a space between the driving passenger and the operating member, and a second airbag section capable of being deployed and inflated on the front side of the vehicle with respect to the operating member so that a pressure at the first airbag section is received by the operating member, and a pressure at the second airbag section is received by the pressure receiving section, upon the activation by the controller.