To provide a combination structure of the metal outer shell of an electronic product and a plastic material for achieving the strong bonding of the metal outer shell and the plastic member, the prevention of the peeling of the plastic member, the smoothing and speedup of a manufacturing system and cost reduction.

The combination structure includes the metal outer shell and the plastic member adhered to the metal outer shell, and the metal outer shell and the plastic member are adhered and connected to each other through a pressure-sensitive adhesive tape. The adsorbing material of the pressure-sensitive adhesive tape absorbs a first adhesive for activating a metal and plastic (coating, spraying and printing system) and the first adhesive is constituted after coagulation.