A manifold is provided, which is connected to an
electrode tab disposed at one of two ends of an
electrode assembly in the axial direction, wherein the end is inserted into the can when facing the bottom of the can. The manifold includes: a terminal engagement portion having a side surface that engages with a cap, the bottom of the can, or an
electrode terminal; an electrode engagement portion surrounding the terminal engagement portion in the radial direction and having another side that connects to the electrode tab of the electrode
assembly; a resilient connection portion disposed between the electrode engagement portion and the terminal engagement portion, and electrically connecting the electrode engagement portion and the terminal engagement portion; and an opening disposed between adjacent resilient connection portions in the circumferential direction, and separating the electrode engagement portion and the terminal engagement portion in the radial or axial direction.