NOVELTY - The method involves preparing a catalyst layer containing an electrolyte resin and an electrolytic membrane (S10). The catalyst layer and the electrolytic membrane are joined (S30) at welding temperature higher than glass transition point of an electrolyte resin by pressure within a range of 0.1-0.5 Mega Pascal, where the glass transition point is above 110 degrees and below 140 degrees, and the welding temperature is less than or equal to 200 degrees. A fuel gas flow channel is formed between an anode side gas diffusion layer and an anode side separator.    USE - Method for manufacturing a membrane electrode assembly of a fixed-type electric power generating apparatus installed in a fuel cell (claimed) i.e. stacked structure polymer electrolyte fuel cell, for a vehicle and a building.    ADVANTAGE - The catalyst layer and the electrolytic membrane are joined at the welding temperature higher than the glass transition point of the electrolyte resin such that tangle and the crystallization by the interface with the catalyst layer and the electrolytic membrane are accelerated, so that joint strength in an interface can be improved, and volatilization of a moisture content by heat processing can be suppressed, and proton conductivity improves, thus achieving coexistence with an improvement of strength of the catalyst layer and a proton conduction characteristic and suppressing disassembly of electrolyte resin and deformation of the catalyst layer and the electrolytic membrane.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a fuel cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating a method for manufacturing a membrane electrode assembly. '(Drawing includes non-English language text)'    Step for preparing a catalyst layer containing electrolyte resin and electrolytic membrane (S10)    Step for forming catalyst layer in an electrolytic membrane (S20)    Step for joining catalyst layer and electrolytic membrane with welding temperature more than glass transition point (S30)