Airbag Attachment Structure

An airbag attachment structure includes a door portion and an opening, and further includes an attachment portion, a hinge portion, and a flap. The door portion is provided with a through hole which penetrates from an inner side to an outer side of the door portion at an inclination of an acute angle from a hinge portion side to an one end portion side of the door portion, the flap has, at a tip portion thereof, a projection portion inserted into the through hole, and in the flap, in a state where the projection portion is inserted into the through hole, a gap is formed between a back surface of an instrument panel and the projection portion, and a gap is formed between a position, which is the tip portion of the flap and at which the projection portion is not formed, and the inner side of the door portion.