PURPOSE: To prevent burns and burning damages due to abnormal temperature rise caused by deterioration of conductive layers by installing an electrode in both end parts of linear conductor groups in which a large number of conductive particles-rubber composition layers are arranged on a resin film in parallel line.

CONSTITUTION: A buffer material 4 is formed on the whole surface of a resin film 1 and conductive particles-rubber composition layers are formed like parallel lines on the other side to give linear conductor groups 2 and electrodes 3, 3' are installed in both end parts of the conductor groups 2. An insulating layer 5 and a buffer material 4' are formed on them. As the resin film 1, films of polyimides, polyamides, and polyester resin are used. The thickness of the conductive layer is about 10-500μm, preferably 20-100μm. As the conductive particles, powder of carbon black. graphite, metals, etc., are used.