NOVELTY - A membrane electrode assembly (100) consists of a solid polymer electrolyte membrane (110), a cathode-gas diffusion electrode (120c) containing a cathode catalyst layer (122c) and a cathode-gas diffusion layer (124c), and an anode-gas diffusion electrode (120a) containing an anode catalyst layer (122a) and an anode-gas diffusion layer (124a). The electrolyte membrane, cathode-gas diffusion electrode, and/or anode-gas diffusion electrode comprise a layer (180a,180c) containing chlorine-capture material.    USE - Membrane electrode assembly is used for fuel cells used in vehicles (both claimed). The fuel cells include polymer electrolyte fuel cells.    ADVANTAGE - The membrane electrode assembly has suppressed deterioration with respect to electrolytic membrane and excellent durability. Generation of hydrogen peroxide in platinum band is suppressed.    DETAILED DESCRIPTION - A membrane electrode assembly (100) consists of a solid polymer electrolyte membrane (110), a cathode-gas diffusion electrode (120c) containing a cathode catalyst layer (122c) and a cathode-gas diffusion layer (124c) arranged on one surface of the electrolyte membrane, and an anode-gas diffusion electrode (120a) containing an anode catalyst layer (122a) and an anode-gas diffusion layer (124a) arranged on the other surface of the electrolyte membrane. The electrolyte membrane, cathode-gas diffusion electrode, and/or anode-gas diffusion electrode comprise a layer (180a,180c) containing chlorine-capture material. The chlorine-capture material is activated carbon, charcoal, carbon black, fullerene, carbon nanotube, and/or ceramics.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the membrane electrode assembly.    Membrane electrode assembly (100)    Solid polymer electrolyte membrane (110)    Anode-gas diffusion electrode (120a)    Cathode-gas diffusion electrode (120c)    Anode catalyst layer (122a)    Cathode catalyst layer (122c)    Anode-gas diffusion layer (124a)    Cathode-gas diffusion layer (124c)    Chlorine-capture layers (180a,180c)