As heating coatings, metal fibers and carbon fibers, plastics and conductive carbon particles, metals and metal powders, metal foils and metal evaporated films are generally used. Plastic-like surface heating elements are used to disperse the above-mentioned heating raw materials in the resin or A laminated product formed with resin. Another method is to use electroless electroplating to plate conductive powder made of Ni-P alloy on flaky mica, A surface-shaped heating element using it as a heating raw material. The planar heating element obtained by dispersing this raw material in a polyurethane resin has a film thickness of 100 μm, can obtain a high heat generation rate with a lower voltage, and the surface temperature rises rapidly. Products with complex shapes can be directly coated. If the surface temperature is about 80°C, it can withstand expansion and contraction caused by heating.