ELECTRIC ENERGY GENERATING ELEMENT

An electrical energy generating device is disclosed which is able to supply oxygen in atmospheric air efficiently to an oxygen electrode and to vaporize water yielded off efficiently, and which is superior in waterproofness. The device includes a plurality of cells each having a hydrogen electrode plate, a proton conductor film and an oxygen electrode plate, and a sheet cover 5 which is air-permeable and waterproofed and which shrouds each cell.