NOVELTY - The fuel cell (1) has a membrane electrode assembly (16) with an electrolytic membrane (10), and an anode pole (12) and a cathode pole (14) that are arranged at both sides of electrolytic membrane. The pore layers (18,20) are arranged at both sides of membrane electrode assembly. A water repellent gas diffusion layer (22) is arranged at the outer side of pore layer of anode pole side. The pore layer of anode pole side and cathode pole side is provided with hydrophilicity.    USE - Fuel cell used as small power supply for mobile machine such as mobile telephone and portable personal computer. Can also be used as power supply for motor vehicle, domestic power supply.    ADVANTAGE - Obtains size reduction, cost reduction, and performance enhancement of the fuel cell since gas diffusion layer at the side of cathode pole is eliminated. Obtains higher power generation characteristic since voltage drop by resistance of the pore layers is reduced. Increases service life of the fuel cell since noble metal and metallic material with corrosion resistances, conductive polymer, electroconductive nitride, electroconductive carbide, electroconductive carbonitride, electroconductive oxide, can be used as surface coating. Prevents damage to membrane electrode assembly since compressive force added to membrane electrode assembly is suppressed by using flat type separator and pore layer is arranged at both the outer sides of membrane electric power joined body. Suppresses flooding at the side of cathode pole and ensures water generated at cathode pole side to anode pole side is moved easily through the electrolytic membrane since retainability of water at pore layer at the side of anode pole is reduced by making pore layer at the side of anode pole into water-repellent property.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross sectional view of the structure of a fuel cell.    Fuel cell (1)    Electrolytic membrane (10)    Anode pole (12)    Cathode pole (14)    Membrane electrode assembly (16)    Pore layers (18,20)    Gas diffusion layer (22)