A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly including a positive electrode, a negative electrode, a separator disposed between the positive and negative electrodes and having an expanded portion protruding to the outside of the positive and negative electrodes; a fixing member including a first support contacting a first outer side of the expanded portion, a second support contacting a second outer side, facing the opposite direction of the first outer side, and a joining portion joining the first and second supports; and a terminal electrically connected with the electrode assembly.