A cylindrical secondary battery comprising: a cylindrical can configured to receive an electrode assembly comprising a positive electrode, a negative electrode, and a separator; a cap assembly located at an upper part of the cylindrical can; a first gasket (133, 220, 230, 240) configured to hermetically seal the cylindrical can in a state of being added so as to cover outer circumferential edges of a top cap (131, 210) and a venting member of the cap assembly; a current interrupt device located at a lower part of the cap assembly; and a second gasket (135, 350, 360) located along an outer circumferential edge of the current interrupt device, wherein an upper end portion (231, 241) of the first gasket is structured and arranged so as to cover an upper surface of the outer circumferential edge of the top cap, and a recessed portion (232, 242) is formed in at least a part of an inner surface of the upper end portion of the first gasket (133, 220, 230, 240), the recessed portion (232, 242) being configured to prevent the first gasket (133, 220, 230, 240) from being brought into tight contact with the upper surface of the outer circumferential edge of the top cap, wherein the second gasket (135, 350, 360) comprises: an upper portion (351, 361) located along an upper surface of the outer circumferential portion of the current interrupt device, the upper portion (351, 361) being arranged to prevent contact between the venting member and the current interrupt device; and a side portion (352, 362) located outside the outer circumferential portion of the current interrupt device, a punched portion (353, 363) is formed in at least a part of the upper portion at a position adjacent to a positive electrode tab coupled to the current interrupt device, wherein the punched portion (353, 363) is defined by a shape in which a part of an inside of the upper portion (351, 361) of the second gasket (135, 350, 360) is removed by punching at a position adjacent to an end of the positive electrode tab that is coupled to the current interrupt device, whereby the punched portion (353, 363) is formed, wherein a connection length between opposite ends of the punched portion (353, 363) is greater than a width of the positive electrode tab. a cylindrical can configured to receive an electrode assembly comprising a positive electrode, a negative electrode, and a separator; a cap assembly located at an upper part of the cylindrical can; a first gasket (133, 220, 230, 240) configured to hermetically seal the cylindrical can in a state of being added so as to cover outer circumferential edges of a top cap (131, 210) and a venting member of the cap assembly; a current interrupt device located at a lower part of the cap assembly; and a second gasket (135, 350, 360) located along an outer circumferential edge of the current interrupt device, wherein an upper end portion (231, 241) of the first gasket is structured and arranged so as to cover an upper surface of the outer circumferential edge of the top cap, and a recessed portion (232, 242) is formed in at least a part of an inner surface of the upper end portion of the first gasket (133, 220, 230, 240), the recessed portion (232, 242) being configured to prevent the first gasket (133, 220, 230, 240) from being brought into tight contact with the upper surface of the outer circumferential edge of the top cap, the second gasket (135, 350, 360) comprises: an upper portion (351, 361) located along an upper surface of the outer circumferential portion of the current interrupt device, the upper portion (351, 361) being arranged to prevent contact between the venting member and the current interrupt device; and a side portion (352, 362) located outside the outer circumferential portion of the current interrupt device, a punched portion (353, 363) is formed in at least a part of the upper portion at a position adjacent to a positive electrode tab coupled to the current interrupt device, wherein the punched portion (353, 363) is defined by a shape in which a part of an inside of the upper portion (351, 361) of the second gasket (135, 350, 360) is removed by punching at a position adjacent to an end of the positive electrode tab that is coupled to the current interrupt device, whereby the punched portion (353, 363) is formed, wherein a connection length between opposite ends of the punched portion (353, 363) is greater than a width of the positive electrode tab.