An electric storage device 10 has a positive electrode 13, a negative electrode 14 and a separator 15 provided between the positive electrode 13 and the negative electrode 14. The negative electrode surface 14b is formed to be larger than the positive electrode surface 13b in such a manner that a positive electrode outer edge 13c and a negative electrode outer edge 14c are apart from each other by 2 mm or more. By this configuration, an ion restricting section 15b is formed at the outer peripheral portion of the separator 15. Accordingly, the movement of the lithium ions toward the negative electrode end surface 14a can be restricted, when the device is charged with a large current, whereby the deposition of metal lithium on the negative electrode end surface 14a can be prevented.