Various embodiments of the present invention relate to a secondary battery and aim to simplify the structure of a terminal part to minimize the space taken up by parts inside a case. To this end, provided in the present invention is a secondary battery comprising: an electrode assembly for a prismatic secondary battery; a case for a prismatic secondary battery for accommodating the electrode assembly; a cap plate coupled to the case; and a terminal part which is coupled to a side portion of the electrode assembly and is extendedly bent from the side portion to an upper portion of the electrode assembly, wherein the terminal part includes a bent part which is bent upward from an end part connected to the upper portion of the electrode assembly to protrude out of the cap plate.