Polymer electrolyte type fuel cell and process for producing the same

A polymer electrolyte fuel cell comprising: a hydrogen ion-conductive polymer electrolyte membrane; an anode and a cathode with the electrolyte membrane interposed therebetween; an anode-side conductive separator having a gas flow channel for supply of a fuel gas to the anode; and a cathode-side conductive separator having a gas flow channel for supply of an oxidant gas to the cathode, wherein each of the anode and the cathode comprises at least a catalyst layer in contact with the electrolyte membrane and a gas diffusion layer in contact with the catalyst layer and the separator, and at least one of the anode and the cathode contains a compound represented by the formula 1: R1-O-ä(C2H4O)n-(C3H6O)mü-R2 where R1 and R2 are an alkyl group having not less than 5 and not more than 15 carbon atoms or a hydrogen atom, n and m are integers which satisfy 0