A tongue of a finger hook of an openable area is opened outward about a resin hinge by pressing the tongue from the inner side of the inner fender. When the finger hook is pulled by the finger hooked therein, the openable area undergoes elastic deformation and can be opened from the fender panel. When the openable area is opened, a gap α is formed between the fender panel and the openable area. In order to pull the finger hook, the finger is inserted into the finger hook from the resin hinge side to the slit portion side.