A cylindrical battery, comprising: a cylindrical battery case; and an electrode group including a positive electrode, a negative electrode, and a separator, wherein the electrode group and the battery case define a space communicated from a top to a bottom defined between an outer peripheral surface of the electrode group and an inner peripheral surface of the battery case; wherein the electrode group has a rectangular parallelepiped shape; wherein one of the positive electrode and the negative electrode has a current collecting terminal that extends outward from the electrode group and is in contact with a bottom surface of the battery case; and characterized in that: one of the positive electrode and the negative electrode is an electrode plate including a current collector and an active material applied to the current collector, the current collector has an unapplied portion that is linearly formed and has no active material applied thereto, and applied portions that are formed at both ends of the unapplied portion and have the active material applied thereto, and the current collector is bent at the unapplied portion so that the applied portions at the both ends face each other, and the unapplied portion is partially provided with a slit, said slit having a slit start point and a slit end point connected by a slit line (c) so as to form the current collecting terminal in a desired shape; and the current collecting terminal is partially bent outward from one of the applied portions along a bent line on a boundary or a line inside the boundary between the unapplied portion and the applied portion. a cylindrical battery case; and an electrode group including a positive electrode, a negative electrode, and a separator, wherein the electrode group and the battery case define a space communicated from a top to a bottom defined between an outer peripheral surface of the electrode group and an inner peripheral surface of the battery case; wherein the electrode group has a rectangular parallelepiped shape; wherein one of the positive electrode and the negative electrode has a current collecting terminal that extends outward from the electrode group and is in contact with a bottom surface of the battery case; and characterized in that: one of the positive electrode and the negative electrode is an electrode plate including a current collector and an active material applied to the current collector, the current collector has an unapplied portion that is linearly formed and has no active material applied thereto, and applied portions that are formed at both ends of the unapplied portion and have the active material applied thereto, and the current collector is bent at the unapplied portion so that the applied portions at the both ends face each other, and the unapplied portion is partially provided with a slit, said slit having a slit start point and a slit end point connected by a slit line (c) so as to form the current collecting terminal in a desired shape; and the current collecting terminal is partially bent outward from one of the applied portions along a bent line on a boundary or a line inside the boundary between the unapplied portion and the applied portion.