Fuel cell, fuel cell power source system and electronic devices using the same

A fuel cell having a membrane electrode assembly for generating power by oxidizing fuel at an anode electrode and reducing oxygen at a cathode electrode a fuel chamber, an anode diffusion layer for allowing fuel to pass therethrough from the fuel chamber toward the outside of the anode electrode of the membrane electrode assembly and transferring electrons generated by the oxidation, a cathode diffusion layer for removing water thus generated and transferring electrons to be used for the reduction to the outside of the cathode electrode, an anode current collector and an anode endplate for transferring electrons generated by the oxidation to the outside of the anode diffusion layer, and a cathode current collector and a cathode endplate for transferring electrons to be used for the reduction to the outside of the cathode diffusion layer, wherein the anode endplate is hydrophilic and has slits for promoting discharge of a gas generated by the reaction, wherein the slits have inclined structures such that their widths widen from a side adjacent the anode diffusion layer toward a side adjacent the fuel chamber, and wherein the anode diffusion layer is hydrophilic.