Head protection airbag device

A head protection airbag device comprising an airbag accommodated with being folded in an upper edge-side of a window of a vehicle and configured to deploy and inflate so as to cover the window upon inflow of an inflation gas, wherein

• the airbag includes:
• a bag main body;
• and
• an attachment member configured to attach the bag main body having been folded to a predetermined attachment part,
• the attachment member includes:
• an attachment substrate;
• a neck part protruding from the attachment substrate;
• and
• an engaging head part arranged with being bulged at a tip end of the neck part, and inserted in and engaged to the predetermined attachment part,
• the bag main body has an insertion hole in which the neck part is inserted so as to enable the engaging head part to protrude from an outer surface-side of a folded body of the bag main body having been folded, and
• the attachment substrate is arranged at a backside of a peripheral edge of the insertion hole so that the attachment member is attached to the bag main body, and wherein the head protection airbag device further comprises:
• a case configured to accommodate therein the folded body, wherein
• the case has an opening through which the bag main body can protrude upon deployment and inflation, and is formed with an engaging hole, in which the engaging head part is inserted and to which the engaging head part is engaged, so as to configure the predetermined attachment part, and wherein
• the case includes a plurality of cases which are arranged in a longitudinal direction of the folded body,
• the attachment member has engaging head parts inserted in and engaged to engaging holes of the cases which are adjacent to each other,
• the attachment substrate of the attachment member has a coupling part arranged between the adjacent cases, and the coupling part is formed to permit bending deformation and to restrain torsion deformation.