Abstract: Problem: To provide a side airbag apparatus which can prevent the deterioration of the neck damage value of a passenger during a side collision or sufficiently protect the waist of the passenger. Resolution Means: A side airbag apparatus 100 installed in a vehicle, including: a bag shaped cushion 114 which is housed in a seat back 104 of a vehicle seat 102 and expanded and deployed on the side of the vehicle seat utilizing gas supplied from an inflator 116; and a holding part 128 for retaining the shape in the housed state of the cushion, wherein the cushion is wound or folded in a long shape in the vertical direction of the vehicle and housed in the seat back in the shape with the upper part 126 thereof further folded back to the anterior of the vehicle, and wherein the holding part retains the upper part or lower part of the cushion which is folded back to the anterior of the vehicle.

Abstract: Problem: To provide a side airbag apparatus which can prevent the deterioration of the neck damage value of a passenger during a side collision or sufficiently protect the waist of the passenger. Resolution Means: A side airbag apparatus 100 installed in a vehicle, including: a bag shaped cushion 114 which is housed in a seat back 104 of a vehicle seat 102 and expanded and deployed on the side of the vehicle seat utilizing gas supplied from an inflator 116; and a holding part 128 for retaining the shape in the housed state of the cushion, wherein the cushion is wound or folded in a long shape in the vertical direction of the vehicle and housed in the seat back in the shape with the upper part 126 thereof further folded back to the anterior of the vehicle, and wherein the holding part retains the upper part or lower part of the cushion which is folded back to the anterior of the vehicle.