Alkaline storage battery

An alkaline storage battery (10) includes a positive electrode (12), a negative electrode (13), a separator (14), and an alkaline electrolyte retained in the positive electrode, the negative electrode, and the separator. The alkaline storage battery further includes a first compound for adsorbing ammonia between the positive electrode (12) and the negative electrode (13). The positive electrode comprises a second compound for increasing oxygen overvoltage at a time of overcharge. Thus, an alkaline storage battery with particularly little self-discharge can be provided.