VEHICULAR CURTAIN AIRBAG STRUCTURE

PROBLEM TO BE SOLVED: To provide a vehicular curtain airbag structure that can prevent a curtain airbag from being easily moved to the exterior side, keep the deployment and inflation position within a cabin, and improve the initial restraining performance of an occupant and the performance for controlling the throw-out of the occupant.SOLUTION: The vehicular curtain airbag structure includes a main chamber 9 which is provided on a side part in the vehicle width direction in a cabin, and deployed and inflated along a side window or a door from an upper side of the cabin to a lower side thereof with inflator gas, a sub chamber 10 which is provided below the main chamber, and deployed and inflated under the main chamber, a communication part 11 which is provided on an upper part of the sub chamber to allow the inflator gas to flow from the main chamber into the sub chamber, and a tether 12 which allows the width HS in the vehicle width direction of the sub chamber to be larger than the width HM in the vehicle width direction of the main chamber.