PROBLEM TO BE SOLVED: To develop airbags corresponding to subdivided positions of a human body rather than an actual human body.SOLUTION: An air bag device includes: one or more buses sensors for acquiring information relating to at least one of acceleration and pressure airbags which are expandable by filling gases and airbag units having arithmetic devices which control filling of gases into the airbag. The plurality of airbag units are connected to the buses, and the arithmetic devices transmit information to adjacent airbag units through the buses and control filling of gases into the airbags based on the information detected by the sensors of own airbag units and the information received from the adjacent airbag units.
