Surface-treated sheet for alkaline secondary battery and method for manufacturing same

The present invention has as its object the provision of a surface-treated sheet for an alkaline secondary battery, which has gas evolution suppressing effect and also has resistance to an alkaline electrolyte solution. A surface-treated sheet of the present invention for an alkaline secondary battery has a base material , and a metal layer formed on at least one side of the base material . The metal layer includes an alloy layer M that contains Ni and Zn, the alloy layer includes a first region A in which a proportion of Ni is 60% to 85% based on a total content of Ni and Zn, and the first region A has a thickness of 0.15 μm or greater.