Abstract: A cylindrical secondary battery makes it possible to perform measurement of a battery voltage, and discharge, and to detect presence or absence of an actuation of an inner pressure sensitive current cutoff mechanism even after a battery inner pressure rises to actuate a current cutoff mechanism. In a cylindrical secondary battery having a pressure sensitive cleavage portion and a pressure sensitive current cutoff mechanism in a can lid, the can lid has at least two metal portions A and B insulated from each other and exposed from a battery inner side to a battery outer side. The metal portion A is electrically connected to an electrode winding body; and the metal portion B is not electrically connected to the electrode winding body before cleavage of the pressure mechanism A, and is electrically connected to the electrode winding body when the pressure mechanism A is cleaved.