Patent ID: 7922190

Claim:
An airbag comprising a first bag formed as a bag by joining first base fabrics, which includes a supply passage for supplying a pressure fluid fed from an inflator inward, and a discharge passage for discharging the pressure fluid supplied inward to an outside; and a second bag formed as a bag by joining second base fabrics, which includes an intake passage for introducing the pressure fluid discharged from the discharge passage of the first bag inward, wherein the discharge passage of the first bag and the intake passage of the second bag are joined while maintaining each cross section shape of the discharge passage and the intake passage, wherein the passage joint member includes a hollow communication pipe inserted into the discharge passage and the intake passage, and an outer tightening member for tightening the discharge passage and the intake passage from an outer circumference to be secured to the hollow communication pipe, and the discharge passage is joined at a position to be inserted between an outer circumference of the hollow communication pipe and an inner circumference of the intake passage.