The present invention is to provide a metal-air battery which can inhibit decrease of discharge capacity and increase of battery's internal resistance caused by the repeated charge and discharge. The metal-air battery comprises: a cathode; an electrolyte layer; and an anode, wherein the cathode, the electrolyte layer, and the anode are laminated in the order mentioned; the cathode comprises a plurality of cathode material layers arranged at intervals; and the direction for laminating the cathode, the electrolyte layer, and the anode intersect with the array direction of the plurality of cathode material layers.