| CPC B60R 21/207 (2013.01) [B60R 21/217 (2013.01); B60R 2021/161 (2013.01)] | 20 Claims |

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1. A side airbag device provided between a vehicle body and a seat comprising:
an airbag module that includes an inflatable airbag and an inflator supplying a gas into the airbag;
a base portion that includes an airbag storage portion having a concave shape and storing the airbag module, and is attached between a vehicle body door and the seat; and
a retainer portion that holds the airbag storage portion from the rear side of the vehicle body,
wherein the base portion includes a through hole through which a harness of the inflator is inserted,
wherein the retainer portion includes a fastening portion which is fastened to the vehicle body, and
wherein the fastening portion is disposed at a different position from the through hole in an up to down direction and in a vehicle body width direction in a rear view of the side airbag device.
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