NOVELTY - The material has a thin nonwoven fabric layer containing an electroconductive thin fiber that contains electroconductive particle of organic resin, where the organic resin contains electroconductive particle. An electroconductive thick fiber is formed with larger average fiber diameter. A conductive fiber i.e. electroconductive thin fiber, is made of hydrophobic organic resin. A thick non-woven fabric layer contains the electroconductive thick fiber. The material is coated with adhesive agent such that excellent electroconductivity is obtained.    USE - Electrode base material e.g. electroconductive porous base materials, such as carbon paper, for a gas diffusion electrode e.g. fuel electrode and air electrode for use in a membrane-electrode assembly (MEA) of a polymer electrolyte fuel cell (PEFC) (all claimed).    ADVANTAGE - The material is equipped with the thin nonwoven fabric layer in a state in which the gas diffusion electrode contains the electroconductive thin fiber of organic resin and the thick non-woven fabric layer contains the electroconductive thick fiber of the organic resin such that solid polymer membrance damage can be avoided due to short-circuits, so that concentrate liquid water on a larger thick nonwoven fabric layer of hole diameter and density of liquid water can be raised when concentrate effect extrudes liquid water function to increase waste-water property, thus obtaining excellent electric power generation by producing the fuel cell.    DETAILED DESCRIPTION - The hydrophobic organic resin is selected from a group consisting of fluorine resin, PTFE, Polychlorotrifluoroethylene, polyvinylidene fluoride, Polyvinyl fluoride, perfluoro alkoxy fluororesin, Tetrafluoroethylene-hexafluoropropylene copolymer, ethylene, tetrafluoroethylene copolymer, ethylene chlorotrifluoroethylene copolymer, vinylidene fluoride tetrafluoroethylene hexafluoropropylene copolymer. The hydrophobic organic resin is thermoplastic hydrophobic organic resin.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a polymer electrolyte fuel cell.    Bipolar plates (11a, 11c)    Gas diffusion layers (13a, 13c)    Moisture content control layers (14a, 14c)    Catalyst layers (15a, 15c)    Solid polymer membrane (19)