
An airbag cover has lid portions which are opened by a breakable portion being broken when the airbag cover is pushed by an airbag which is being inflated and is formed from a synthetic resin by molding into a single layered airbag cover. A breakable portion on a distal side of the lid portions is formed as a distal edge straight section through cutting operation which utilizes a cutting blade. The part is formed by providing a thick portion and a thin portion so that a maximum change rate which...











