To provide a nickel hydrogen secondary battery which has a cycle life equal to or longer than the conventional batteries and can improve highly effective discharging characteristic by using powder of an alloy as an electrode, where the powder is either finely divided powder of a hydrogen absorption alloy or powder of a hydrogen absorption alloy which contains decreased amount of cobalt.

Monosaccharide and/or oligosacharide is contained in a nickel hydrogen secondary battery for improving erosion resistance of an alloy.