PURPOSE: To provide a low-environmental-pollution, safe, and high-performance zinc alkaline battery using unhardening and lead-unadded zinc alloy powder.

CONSTITUTION: Unhardening and lead-unadded zinc alloy powder, which contains indium by 0.01-0.1wt.%, bismuth by 0.001-0.01wt.%, gallium by 0.001-0.05wt.%, and at least one kind or more being selected from among the group consisting of titanium and manganese by 0.001-0.05wt.% in total, is used for negative pole active matter 5. Furthermore, as an anticorrosive for the zinc alloy powder, this has a get-shaped negative electrode 4 where indium compound is added by 0.005-0.5wt.% in terms of indium to the zinc alloy powder. This accomplishes the lower environmental pollution of the unhardening and battery with lead unadded, and besides gas occurs less than the case where unhardening and zinc alloy powder with lead added is used, so this is safe and high-performance.