Patent attributes
An airbag, which is folded and assembled elongatedly, is deployed along a side window. The airbag has a folded portion and a pleated portion which wraps the folded portion under the assembled condition. The airbag also has an inner tube which is provided from the inside of an infusion portion to the inside of an upstream portion of an inflating portion. The inner tube prevents that the airbag is damaged by heat of inflation gas. When the airbag is assembled, the inner tube is positioned along a first fabric, which is developed so that the surface of the first fabric faces an inside of a vehicle compartment, by the infused fluid. Deployment performance of the airbag (curtain airbag deploying along a side window of an automobile) is improved.