A lithium ion secondary battery that includes a laminated electrode assembly in which a positive electrode having a positive electrode active material layer, a negative electrode having a negative electrode active material layer, and a separator interposed between the positive electrode and the negative electrode are alternately planarly laminated. The laminated lithium ion secondary battery has an end-of-charge voltage of 4.41 V to 4.47V, a ratio of the entire area of the negative electrode active material layer to an area of facing portions of the positive electrode active material layer and the negative electrode active material layer of 100.5% to 104.0%, a gap between the positive electrode and the negative electrode of 0.1 mm to 0.5 mm, and a discharge capacity per unit weight of a positive electrode active material in the positive electrode active material layer of 169.0 mAh/g to 178.0 mAh/g.