NOVELTY - The polymer electrolyte fuel cell has membrane electrode assembly or gaseous-diffusion layer composite having a solid polymer electrolyte film (4), a catalyst layer (3) and a gaseous diffusion layer (1). Layer (1) and film (4) are joined through a fixed bed (2), such that catalyst layer is surrounded. The fixed bed contains resin having low swelling degree with respect to water than that of solid polymer electrolyte film.    USE - As domestic power supply and power supply for vehicle drive.    ADVANTAGE - The polymer electrolyte fuel cell is prevented from dimensional change by moisture content of solid polymer electrolyte film, and has excellent durability and output characteristics. The fuel cell is economical. The gaseous diffusion property of gaseous diffusion layer is simply controlled.    DETAILED DESCRIPTION - The polymer electrolyte fuel cell has membrane electrode assembly or gaseous-diffusion layer composite. The assembly or composite has a solid polymer electrolyte film (4), and a catalyst layer (3) and a gaseous diffusion layer (1) at anode side and cathode side of electrolyte film. The peripheral portion of catalyst layer exists inside the peripheral portion of electrolyte film and diffusion layer. The catalyst and/or diffusion layer are pinched to a support with electrolyte film. The area of catalyst layer and/or gaseous diffusion layer is larger than the area of solid polymer electrolyte film. The gaseous diffusion layer and solid polymer electrolyte film are joined through a fixed bed (2), such that catalyst layer is surrounded. The fixed bed contains resin having low swelling degree with respect to water than that of solid polymer electrolyte film. An INDEPENDENT CLAIM is included for manufacture of membrane electrode assembly or gaseous diffusion layer composite.    DESCRIPTION OF DRAWING(S) - The figure shows the sectional view of membrane electrode assembly for gaseous diffusion layer composite.    gaseous diffusion layer (1)    fixed bed (2)    catalyst layer (3)    solid polymer electrolyte film (4)