COMPOSITE MEMBRANE, FUEL CELL USING COMPOSITE MEMBRANE, COLLECTOR AND FUEL CELL USING COLLECTOR

A compound membrane that can connect the cells of planar array fuel cells in a simple manner is provided, along with a fuel cell that uses such a compound membrane to obtain any desired current and voltage. The compound membrane has a plurality of regions with different properties. The membrane includes a plurality of first regions that conduct protons between first and second main surfaces, and a second region that conducts electrons between the first and second main surfaces. The fuel cell using the compound membrane includes a plurality of first electrodes, a plurality of second electrodes, a first electron conductive member that connects one of the first electrodes to the second region, and a second electron conductive member that connects one of the second electrodes to the second region.