NOVELTY - A fuel cell comprises a solid polymer electrolyte membrane which has proton-conductivity, and an anode electrode and a cathode electrode provided on surface of electrolytic membrane. The anode electrode has fuel gas flow channel into which fuel gas flows, and an anode side catalyst layer containing platinum as catalyst in electrochemical reaction. The cathode electrode has fuel gas flow channel into which fuel gas flows, and cathode side catalyst layer containing platinum as catalyst in electrochemical reaction.    USE - Fuel cell is used for electric power generation and power supply for motor vehicles.    ADVANTAGE - The fall of oxidation-reduction reaction of fuel cell is prevented.    DETAILED DESCRIPTION - A fuel cell comprises a solid polymer electrolyte membrane (2) which has proton-conductivity, and an anode electrode and a cathode electrode provided on surface of electrolytic membrane. The anode electrode has fuel gas flow channel into which fuel gas flows, and an anode side catalyst layer containing platinum as catalyst in electrochemical reaction. The cathode electrode has fuel gas flow channel into which fuel gas flows, and cathode side catalyst layer containing platinum as catalyst in electrochemical reaction. The anode side catalyst layer and cathode side catalyst layer has a non-supported catalyst layer (312) which does not support platinum, corresponding to predetermined region including down stream portion of fuel gas flow channel facing both sides of electrolytic membrane and upstream portion of oxidant gas flow channel and upstream portion of fuel gas flow channel facing both sides of electrolytic membrane and downstream portion of oxidant gas flow channel, and a supported catalyst layer (311) corresponding to regions other than predetermined regions which supports platinum on a support. The fuel cell produces electric power based on electrochemical reaction of fuel gas and oxidant gas as reactive gases.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of movement of water in electrolytic membrane electrode assembly of fuel cell.    Electrolytic membrane electrode assembly (1)    Solid polymer electrolyte membrane (2)    Water (5)    Supported catalyst layers (311,411)    Non-supported catalyst layers (312,313,412,413)