Side airbag device

A side airbag device comprising:

• an inflator configured to generate a gas;
• and
• a bag-shaped airbag inflatable and deployable in a space above a console box and beside an inner side in a vehicle width direction relative to a vehicle seat in response to the gas upon activation of the inflator, the console box provided on an inner side in a vehicle width direction relative to the vehicle seat,
• the airbag including a torso protection portion, a support portion provided on a console box side of the torso protection portion and configured to be pushed onto a top surface of the console box in an inflated and deployed state, and a hip protection portion inflatable and deployable close by a lateral portion of the console box,
• the support portion and the hip protection portion being defined by a continuous chamber,
• the inflator being positioned from above to below the support portion in a side view of the vehicle,
• the airbag being mounted on a lateral portion of the vehicle seat via the inflator, and
• the airbag further comprising a middle base fabric piece that is on a front side in the vehicle and has a shape extending along the top surface and side surface of the console box in a front-rear view of the vehicle.