The invention relates to a rechargeable battery and a method of assembling the rechargeable battery. The method includes the steps of: accommodating an electrode assembly into a case, the electrode assembly having first and second electrode tabs protruding therefrom; forcibly inserting an electrode terminal into an insulating gasket, the insulating gasket having an inner diameter smaller than an outer diameter of the electrode terminal; forcibly inserting the insulating gasket into a terminal hole in a cap plate of a cap assembly; and sealing the case with the cap assembly. Accordingly, it is possible to increase a sealing force between the case and the cap assembly and effectively insulate the electrode terminal from the cap plate. |