A high tension cable device according to the present invention for use with an ignition system having a discharge tube for forming a series gap therein in an automobile engine or the like can eliminate a so-called creeping discharge which is likely to occur along the external peripheral surface of the discharge tube, and the above cable device comprises; a cylindrical casing having a connecting terminal therein in a firmly engaged formed at one end thereof, which connecting terminal being engageable with a terminal of an ignition plug of an engine side; an auxiliary functional section composed of one or a plurality of auxiliary functional parts such as the discharge tube which are fixedly inserted into said cylindrical casing, wherein the front end of the auxiliary section is connected to the rear end of the connecting terminal, and the rear end thereof is connected to a terminal of a high tension cable side, characterized in that the cylindrical casing is formed by an electrically insulating rigid material and the outer periphery of the auxiliary section is covered with an electrically insulating elastic layer, which cylindrical casing and elastic layer forming a space between respective inner and outer surfaces. The high tension cable device constructed above never causes unmeasurable destruction of insulation, so that a cable device of a high reliability is made possible.