Resin molded article constituting electrostatic-capacitance type operation device

A resin molded article constituting an electrostatic-capacitance operation device, comprising:

• a resin sheet having an operation surface, and an inner surface, at least a whole or a part of the inner surface being a three-dimensional curved surface, and
• an electrode sheet arranged to contact the inner surface of the resin sheet, the electrode sheet providing an electric signal according to an amount of change of electrostatic capacitance generated by a contact operation with respect to the operation surface,
• wherein the electrode sheet has a through hole located substantially at a center of the electrode sheet so as to allow a molten resin for forming the resin sheet to flow therethrough,
• a part of the resin sheet is located in the through hole and directly contacts an inner edge of the through hole, and
• the whole of the inner surface of the resin sheet is formed as the three-dimensional curved surface, and the resin sheet has a portion directly contacting the inner edge of the through hole, an inside of the through hole has a surface substantially flush with an inner side of the resin sheet.