To reduce electrical wear caused by minor roughness on the sliding surface of a rigid suspending type or third rail type electric traction where a conductive steel rail is used.

Between sliding plates 2 disposed on the shoe body of a pantograph which collects current sliding on a rigid suspending type electric traction where a conductive steel rail is used, an additional sliding plate 3 is provided. On the sliding plate 3, a metallic sliding surface which is softer than the sliding plates 2 disposed on the electric traction in parallel and is formed out of metal 4 whose conductivity is high is formed flush with the sliding plates 2 disposed in parallel.