Patent ID: 7163233

Claim:
A head-protecting airbag normally folded and housed in an upper edge of windows inside a vehicle, and deployable downward from the upper edge of windows upon inflow of inflation gas to cover the vehicle's inner side of the windows, the airbag comprising: an inner side wall and an outer side wall, wherein inner and outer side walls separate from each other upon inflation of the airbag; and a tether, wherein the tether is joined to the inner side wall and the outer side wall internally of the airbag such that the tether regulates a clearance between the inner side wall and the outer side wall as the airbag is completely inflated, a joint portion of the tether to the vehicle's inner side wall being located at lower level than a joint portion of the tether to the vehicle's outer side wall as viewed in a vertical section taken along the vehicle's transverse direction, wherein in an inflatable portion of the airbag above the tether, a length of the inner side wall above the joint portion of the tether is greater than a corresponding length of the outer side wall above the joint portion of the tether.