Folding completion body of airbag and airbag

A folding completion body of an airbag, the airbag including:

• an airbag body configured to be stored on an upper edge of a window on an inboard side of a vehicle in a folded-up state, and to be deployed and inflated downward to cover an inboard side of the window at the time of inflow of an inflation gas;
• and a plurality of mounting pieces which extend from an upper edge of the airbag body and mount the airbag body to the upper edge of the window, wherein:
• the airbag is stored in the upper edge of the window in such a manner that a lower edge of the airbag body in a flatly deployed state is folded to be brought close to the upper edge;
• the plurality of mounting pieces are mounted to the upper periphery of the window with at least one of the mounting pieces folded to be shortened;
• the lower edge of the airbag body in a flatly deployed state is folded to be brought close to the upper edge so as to form a folded body;
• a folding-collapse preventing member is assembled to the folded body;
• the mounting piece folded to be shortened has a lug which protrudes sideward between a base portion on the upper edge of the airbag body and a mounting portion mounted on the upper edge of the window;
• and
• the mounting piece with the lug is folded and superimposed to the upper edge of the airbag body in the folded body, and the lug is interposed between the folding-collapse preventing member assembled to the folded body and a surface of the folded body so as to be fixed to the folded body.