A reaction between the depolarizing mixture in the spent manganese batteries and (NH₄)₂SO₄ was carried out to find a new process for the extraction of Mn component from the spent manganese batteries. The optimum conditions were as follows : the reaction temperature 425℃, (NH₄)₂SO₄ weight ratio to the depolarizing mix in the spent manganese batteries 12.0, reaction time 60min. Under above conditions manganese was extracted 93.5%.