Method for making alkaline storage battery

带以聚烯烃系树脂为主要成分的纤维构成的无纺布实施了亲水化处理的隔层的碱性蓄电池的制造方法，其特征在于包含对无纺布亲水化处理的步骤；和对上述无纺布实施厚度加工，使下式(1)所示的隔层的表观密度达到0.40g/cm#+[3]以上的厚度加工步骤。表观密度＝隔层单位面积重量÷隔层的厚度...(1) There is disclosed a method of manufacturing an alkali storage cell comprising a separator in which a nonwoven fabric composed of fibers consisting essentially of polyolefin resin is treated with a hydrophilizing treatment. The method of the present invention comprises the steps of: treating the nonwoven fabric with a hydrophilizing treatment; and adjusting a thickness of the separator after the step of treating the nonwoven fabric with a hydrophilizing treatment so that an apparent density of the separator represented by the following equation results in not less than 0.40 g/cm . A method of the present invention makes it possible to produce a separator with an increased strength and excellent gas permeability, and thereby to manufacture an alkali storage cell with a low short circuit occurrence rate and reduced cell internal pressure. Moreover, thickness reduction of the separator is achieved, and thereby it is made possible to manufacture a large capacity alkali storage cell.