To provide a manufacturing method of an adhesive product enhanced in adhesiveness by making the roughness degree of a bonding surface fine and uniform to apply high polarity treatment processing in a shell part comprising a polymeric material and a second substance used for forming a hollow body or a recessed structure bonded through an adhesive.

The adhesive product is manufactured by providing a sheetlike or false sheetlike current passing material to the interior or inside of the layer of the shell part of the hollow body and subsequently applying corona discharge treatment to the outside surface of the shell part comprising the polymeric material before bonding the shell part comprising the polymeric material using a solventless adhesive as the adhesive. In a product constituted by bonding a skin to the outside surface of the shell part comprising the polymeric material forming the hollow body or the recessed structure through the adhesive, the bonding surface is uniformly surface-treated by corona discharge treatment.