SIDE AIRBAG DEVICE

PROBLEM [0002] An object of the present invention is to provide a side airbag device for which the deployment behavior of a cushion during expansion and deployment can readily be controlled and that can reliably receive and protect an occupant. [0003] RESOLUTION MEANS [0004] Aside airbag device 100, includes: an inflator 124 that supplies gas; and a bag-shaped cushion 120 that expands and deploys on a far side of a vehicle seat 104 using the gas from the inflator; where the cushion includes: a first chamber 126 that restrains an occupant 122 during expansion and deployment the first chamber expanding and deploying at a position higher than an upper surface 134 of a console box 118 disposed between the vehicle seat and an adjacent seat 110 positioned on a far side of the vehicle seat; and a second chamber 128 connected to the first chamber via a vent hole 142, the second chamber being in frictional contact with the upper surface of the console box during expansion and deployment.