CYLINDRICAL BATTERY

Provided is a cylindrical battery capable of avoiding functional loss of a sealing body when a lead plate is welded to a positive electrode external terminal and having an excellent gas discharging function. The cylindrical battery (10) includes: an electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator therebetween; an electrolyte; a bottomed cylindrical outer can that houses the electrode body and the electrolyte; and a sealing body (30) that closes an opening of the outer can, wherein the sealing body (30) includes a rupture plate (33) that is caulked and fixed to the opening of the outer can with a gasket (21) therebetween, and an external terminal (35) that is not caulked and fixed to the opening of the outer can, the rupture plate (33) has a valve part (33B) that is ruptured when an internal battery pressure rises, and the external terminal (35) is fixed to an upper surface portion of a valve part (33B).