A battery includes: a positive electrode including a positive electrode substrate having a first surface and a second surface, a positive active material applied to the first surface of the positive electrode substrate, and a positive electrode tab attached to the first surface of the positive electrode substrate; a negative electrode including a negative electrode substrate having a first surface and a second surface, a negative active material applied to the first surface of the negative electrode substrate, and a negative electrode tab attached to the first surface of the negative electrode substrate; and a separator provided between the positive electrode and the negative electrode, wherein the first surface of the negative electrode substrate includes a first region to which the negative active material is not applied and which faces the positive electrode tab, the first surface of the negative electrode substrate includes a second region to which the negative active material is applied and which is adjacent to the first region in a longitudinal direction of the positive electrode tab, and the negative electrode includes an insulating layer disposed in at least a portion of the first region.