A shield shell is composed of a tubular shell body made of a conductive resin and a metallic conductive body mounted in the shell body. The conductive body is capable of, in the base end part, connecting with a shielding member by being exposed on the surface of the shell body, while in the tip part, connecting with a shield case by being exposed on the surface of the shell body. The shielding member and the shield case are connected via the metallic conductive body of a low electric resistance, and thereby achieving excellent shielding performance in a low-frequency region in the shield shell.