MEMBRANE ELECTRODE ASSEMBLY AND MEMBRANE ELECTRODE ASSEMBLY FABRICATION METHOD

[Problems to be Solved] To provide a membrane electrode assembly and a membrane electrode assembly manufacturing method which can suppress defective molding when a resin frame integrated with a peripheral edge of the membrane electrode assembly is molded. [Means to Solve the Problems] A membrane electrode assembly 30 includes a polymer electrolyte membrane 32, a catalyst layer disposed on a surface of the polymer electrolyte membrane 32, and a gas diffusion layer 45 disposed on a surface of the catalyst layer, the surface opposite to a surface on which the polymer electrolyte membrane 32 is disposed, in which the gas diffusion layer 45 includes corner portions 31A to 31D which are chamfered such that the corner portions do not have an acute angle.