The present invention provides alkaline storage batteries of which high-rate discharge characteristic at low-temperature, cycle life, and storage performance at high-temperature are improved in good balance and the cost performance is superior even when the content of cobalt is made extremely low by using in the negative electrode consisting of hydrogen absorbing alloy powders based on MmNi system alloys comprising MmNi.sub.5 system alloy which remains mostly crystalline in phase when absorbing hydrogen and Mm.sub.2 Ni.sub.7 system alloy which turns mostly amorphous in phase upon absorbing hydrogen.