Curtain airbag device

A curtain airbag device stored in an interior member on an upper side of a sidewall of a vehicle, comprising:

• an inflator configured to generate a gas;
• an airbag that is a bag body stored in a folded state and is configured to be inflated and deployed downward from the upper side of the sidewall of the vehicle by the gas;
• and
• a restricting member connecting the airbag and the sidewall of the vehicle,
• the airbag comprising
• an outer circumferential joining portion joining a vehicle exterior side base fabric and a vehicle interior side base fabric, thereby forming the bag body,
• a gas inlet portion which is arranged at an upper edge of the airbag and into which the gas is to be introduced, and
• a joining portion which is arranged in a region surrounded by the outer circumferential joining portion between the gas inlet portion and an end portion of the bag body in a longitudinal direction of the vehicle and joins the vehicle exterior side base fabric and the vehicle interior side base fabric,
• the airbag, while being stored in the folded state, comprising
• a roll folding portion formed by folding the bag body into a roll shape in a direction from a lower edge of the bag body to an upper edge thereof with the vehicle interior side base fabric facing outside, and
• a flip folding portion formed by folding back the bag body with the vehicle interior side base fabric facing inside between the roll folding portion and the upper edge of the bag body,
• the restricting member comprising
• a tip portion fixed to a lower side of the sidewall of the vehicle, and
• a base end portion joined to the vehicle exterior side base fabric located at the flip folding portion or an upper end portion of the roll folding portion.