MULTILAYER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY, WATER ELECTROLYSIS-TYPE HYDROGEN GENERATOR AND METHOD OF PRODUCING MULTILAYER ELECTROLYTE MEMBRANE

A laminated electrolyte membrane including a first layer including a hydrocarbon polymer electrolyte as a major component, and a second layer including a fluoropolymer electrolyte and polyvinylidene fluoride as major components laminated on at least one side of the first layer, wherein the first layer and the second layer are laminated via a region in which components constituting both layers are mixed in a mixed region.