Rechargeable battery

Disclosed is a rechargeable battery for improving vibration durability and insulating property of an electrode assembly by controlling a position of the electrode assembly in a case while providing easy insertion of the electrode assembly. The rechargeable battery includes: an electrode assembly formed by winding an anode and a cathode disposed at both sides of a separator together with the separator; a case housing the electrode assembly; a cap plate closing and sealing an opening formed at an end of the case; an electrode terminal installed at a terminal hole of the cap plate and extended to the inside/outside of the case; a lead tab connecting the electrode terminal and the electrode assembly in the case; and a retainer interposed between the lead tab and the case and formed with an electric insulating material.