This alloy powder for electrodes contains hydrogen storage alloy particles having an AB2 type crystalline structure. The hydrogen storage alloy contains: a first element located in the A-site of the crystalline structure and including Zr; and a second element located in the B-site and including Ni and Mn. The hydrogen storage alloy contains a plurality of alloy phases with different Zr concentrations. In all the alloy phases, Zr accounts for more than 70 atom% of the first element.