An insert film having a printed part is integrally molded to a surface of a panel body made of a resin by an insert molding. The printed part is printed on a first binder layer applied to a resin film and also is formed on the resin film in a state such of being sealed with the first binder layer and a second binder layer applied on the printed part. The printed part is formed as a trimming portion (blackout) along a peripheral portion of the resin film, and an area is formed between the peripheries of the first binder layer and the second binder layer and the periphery of the resin film.