A membrane electrode assembly is used for a planer type fuel cell. The membrane electrode assembly includes an electrolyte membrane, anodes and cathodes disposed counter to the anodes. Ends of current collectors are connected to one side of the anodes, respectively. Ends of current collectors are connected to one side of the cathodes, respectively. On a cathode side, the current collectors are provided in positions opposed respectively to the insulators provided on an anode side with the electrolyte membrane interposed in between. A cathode-side current collection and an anode-side current collector are connected by an interconnector, and adjacent cells are electrically connected in series with each other.