A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly which includes a first electrode, a second electrode, and a separator installed between the first electrode and the second electrode; a case which stores the electrode assembly; a cap plate which includes a first plate and a second plate combined to the first plate, and is combined to the opening of the case; and a bent part which is formed in a part where the first plate of the cap plate is combined to the second plate.
