Airbag apparatus and method of manufacturing airbag

An airbag apparatus comprising:

• an airbag disposed in front of a passenger to be inflated toward a rear side of a vehicle for protecting the passenger in case of a vehicle accident, said airbag including a center side airbag section located in a center area of the vehicle in a width direction of the vehicle, said center side airbag section extending vertically at the center area of the vehicle in an inflated state in a front-rear direction, a window side airbag section located at a window side of the vehicle in the width direction, said window side airbag section extending vertically at a window side of the vehicle in the inflated state in the front-rear direction, and an upper edge extending between the center side airbag section and the window side airbag section in the inflated state, said upper edge at the window side airbag section being lower than that at the center side airbag section so that the window side airbag section does not interfere with a side portion of the vehicle, and
• a gas supply device for supplying gas to inflate the vehicle airbag,
• wherein said airbag further includes a front side facing the passenger, a curved upper portion extending from the front side to a back side at a side opposite to the front side through the upper edge, and a curved lower portion extending from the front side to the back side through a lower edge extending substantially horizontally in the inflated state,
• the curved upper portion has a size greater than that of the curved lower portion when viewed from a side of the airbag, and
• the curved lower portion at the center side airbag section has a shape same as that of the window side airbag section, and has a semi-circular shape.