PURPOSE: To even the metallographic structure of hydrogen storage alloy, and to improve the corrosion resistance without lowering activity, and to obtain hydrogen storage alloy electrode, which has the excellent cycle characteristic and efficient discharge characteristic, and the manufacturing method thereof.

CONSTITUTION: In a hydrogen storage alloy electrode using Mm-Ni group hydrogen storage alloy including a second phase, which is not dissolved in a base phase, hydrogen storage alloy having crystal grains at 10μm or less of dendrite cell size is used. In the manufacture of hydrogen storage alloy electrode using Mm-Ni group hydrogen storage alloy including a second phase, which is not dissolved in a base phase, a first step for dissolving an element for forming hydrogen storage alloy and a second step for cooling this dissolved solvent at a cooling speed of 180°C/sec or higher are provided.