Airbag cushion and folding method of airbag cushion

An airbag cushion comprising:

• an airbag configured to be folded at a seat and to wrap around sides and front of an occupant by being deployed outward from the seat during inflation and then unfolded forward, and configured to be capable of bending inward;
• and
• a shape retention member having a first end connected to the airbag and a second end connected to the seat, and configured to allow a form of the inflated airbag wrapping the sides and front of the occupant to be maintained;
• wherein the airbag is folded inward by a first folding amount in a state in which the shape retention member is folded inward, and folded outward by a second folding amount, and
• wherein the shape retention member is folded to wrap the airbag in a direction opposite to a direction in which the airbag is folded by the second folding amount such that the second end of the shape retention member is positioned inward.