A method for manufacturing a membrane electrode assembly comprises a
process for preparing a electrolyte membrane and two gas diffusion
layers, and a bonding process for forming the membrane electrode assembly
by pressing a layered unit in which the electrolyte membrane is
sandwiched between each of the two gas diffusion layers in such a way
that provided catalyst layers locate in the interfaces between the
electrolyte membrane and the two gas diffusion layers, wherein the
bonding process is undertaken in a condition in which the surfaces of the
electrolyte membrane are temporarily liquefied or softened.