NOVELTY - The battery cover member (110) comprises a metallic electrode terminal, and a metallic cover member (130) having a through hole and an insulating resin member. The electrode terminal is inserted into the metallic cover member through hole, where the cover member and the electrode terminal are integrally bonded together by the insulating member, has a sealing area, which is formed as a columnar shape or an elliptically columnar shape, and is integrally formed from columnar rod member by plastic processing. The electrode terminal further has a flat-plate-shaped collector terminal.    USE - The battery cover member is useful for an angular sealed battery of a power source of an electric vehicle (claimed) and an electric power source of a portable electronic device.    ADVANTAGE - The battery cover member exhibits a high sealing characteristic, and superior adhesion between electrode members and insulating resin member.    DETAILED DESCRIPTION - The battery cover member (110) comprises a metallic electrode terminal, and a metallic cover member (130) having a through hole and an insulating resin member. The electrode terminal is inserted into the metallic cover member through hole, where the cover member and the electrode terminal are integrally bonded together by the insulating member, has a sealing area, which is formed as a columnar shape or an elliptically columnar shape, and is integrally formed from columnar rod member by plastic processing. The electrode terminal further has a flat-plate-shaped collector terminal connected to an electrode member, a flat-plate-shaped external terminal connected to a connect member, and a joint that is formed into a shape of a three-dimensional line of flexure and connects the collector terminal to the external terminal. The insulating member includes an adhesive modifying agent, and the electrode terminal and the cover member are surface treated by a triazine dithiol compound or a silane coupling agent. The battery cover member has a cylindrical portion into which a protuberance of the insulating member is inserted.    DESCRIPTION OF DRAWING(S) - The diagram shows an oblique perspective view of a battery cover member.    Battery cover member (110)    Cover member (130)    Pair of electrode terminals (140)    Molten resin insulating sealing member. (150)