A display device comprises a metallic wiring formed on an insulating substrate, an inorganic insulating film formed on the metallic wiring, an organic resin film formed on the inorganic insulating film, a transparent conductive film formed in a portion on the metallic wiring where the inorganic insulating film and the organic resin film are removed, a connection terminal formed in a region for mounting a driving IC external to the display region on the insulating substrate, and a bump of the driving IC connected to the connection terminal by an anisotropic conductive film in order to supply a signal to the display region. The region for mounting a driving IC includes a region where the inorganic insulating film and the organic resin film are formed on the metallic wiring and a region where the inorganic insulating film and the organic resin film are removed from the metallic wiring.