An air bag apparatus comprising: a base plate, two gas generators (30a, 30b), a first gas generator and a second gas generator, fixed to one side of the base plate; a cover member (40, 140) covering the two gas generators (30a, 30b) from the same side as the one side of the base plate; an air bag accommodated in contact with the base plate; a hollow (21, 121, 221) formed in the one side of the base plate and provided with a communication hole (25a, 25b, 125, 225), characterized in that the air bag apparatus further comprising: a pyrotechnic gas generator that generates combustion gas by burning a solid gas generating agent being used; the two gas generators (30a, 30b) being arranged in the hollow (21, 121, 221) with a space therebetween, such that a gap (60a, 60b, 61a, 61b), for communicating with the communication hole (25a, 25b, 125, 225), is formed between the hollow (21, 121, 221) and a gas discharge port (32a, 32b) of the respective gas generators (30a, 30b), the cover member (40, 140) covering the two gas generators (30a, 30b) such as to form a gap (60a, 60b, 61a, 61b) between the cover member (40, 140) and the gas discharge port (32a, 32b) of the respective gas generators (30a, 30b), the air bag accommodated such that a gas inlet thereof encloses the communication hole (25a, 25b, 125, 225) in the hollow (21, 121, 221) from the other side of the base plate, the air bag, the base plate and the cover member (40, 140) being integrally fixed by fastening, with a fastening member, the base plate, the cover member (40, 140) and a frame shaped air bag attachment member which is arranged to abut against the gas inlet in an inside of the airbag, the two gas generators (30a, 30b) being fixed by the hollow (21, 121, 221) of the base plate and the cover member (40, 140), and a sealed gas discharge path formed by the cover member (40, 140) and the base plate, and leading from each gas discharge port (32a, 32b) of the two gas generators (30a, 30b) to the gas inlet of the air bag. a base plate, two gas generators (30a, 30b), a first gas generator and a second gas generator, fixed to one side of the base plate; a cover member (40, 140) covering the two gas generators (30a, 30b) from the same side as the one side of the base plate; an air bag accommodated in contact with the base plate; a hollow (21, 121, 221) formed in the one side of the base plate and provided with a communication hole (25a, 25b, 125, 225), characterized in that the air bag apparatus further comprising: a pyrotechnic gas generator that generates combustion gas by burning a solid gas generating agent being used; the two gas generators (30a, 30b) being arranged in the hollow (21, 121, 221) with a space therebetween, such that a gap (60a, 60b, 61a, 61b), for communicating with the communication hole (25a, 25b, 125, 225), is formed between the hollow (21, 121, 221) and a gas discharge port (32a, 32b) of the respective gas generators (30a, 30b), the cover member (40, 140) covering the two gas generators (30a, 30b) such as to form a gap (60a, 60b, 61a, 61b) between the cover member (40, 140) and the gas discharge port (32a, 32b) of the respective gas generators (30a, 30b), the air bag accommodated such that a gas inlet thereof encloses the communication hole (25a, 25b, 125, 225) in the hollow (21, 121, 221) from the other side of the base plate, the air bag, the base plate and the cover member (40, 140) being integrally fixed by fastening, with a fastening member, the base plate, the cover member (40, 140) and a frame shaped air bag attachment member which is arranged to abut against the gas inlet in an inside of the airbag, the two gas generators (30a, 30b) being fixed by the hollow (21, 121, 221) of the base plate and the cover member (40, 140), and a sealed gas discharge path formed by the cover member (40, 140) and the base plate, and leading from each gas discharge port (32a, 32b) of the two gas generators (30a, 30b) to the gas inlet of the air bag. a pyrotechnic gas generator that generates combustion gas by burning a solid gas generating agent being used; the two gas generators (30a, 30b) being arranged in the hollow (21, 121, 221) with a space therebetween, such that a gap (60a, 60b, 61a, 61b), for communicating with the communication hole (25a, 25b, 125, 225), is formed between the hollow (21, 121, 221) and a gas discharge port (32a, 32b) of the respective gas generators (30a, 30b), the cover member (40, 140) covering the two gas generators (30a, 30b) such as to form a gap (60a, 60b, 61a, 61b) between the cover member (40, 140) and the gas discharge port (32a, 32b) of the respective gas generators (30a, 30b), the air bag accommodated such that a gas inlet thereof encloses the communication hole (25a, 25b, 125, 225) in the hollow (21, 121, 221) from the other side of the base plate, the air bag, the base plate and the cover member (40, 140) being integrally fixed by fastening, with a fastening member, the base plate, the cover member (40, 140) and a frame shaped air bag attachment member which is arranged to abut against the gas inlet in an inside of the airbag, the two gas generators (30a, 30b) being fixed by the hollow (21, 121, 221) of the base plate and the cover member (40, 140), and a sealed gas discharge path formed by the cover member (40, 140) and the base plate, and leading from each gas discharge port (32a, 32b) of the two gas generators (30a, 30b) to the gas inlet of the air bag.