AAA rechargeable battery according to the invention comprises an electrode assembly (10), a case (25) for mounting the electrode assembly (10) and an electrolyte solution therein, a cap plate (20) for closing an opening of the case (25), wherein an electrolyte solution absorption member (90) is provided inside the case (25) coupled to the cap plate (20) to absorb a residual electrolytic solution containing within the case (25).