Rechargeable battery

Disclosed is a rechargeable battery including an electrode assembly in which positive and negative electrodes and a separator may be exactly arranged. The rechargeable battery includes an electrode assembly including a positive electrode, a negative electrode, and a separator, a case housing the electrode assembly, a positive terminal being electrically connected with the positive electrode and protruded outside the case, and a negative terminal being electrically connected with the negative electrode and protruded outside the case. The positive and negative electrodes respectively include a plurality of positive uncoated regions and a plurality of negative uncoated regions extended out of the separator and laminated along one direction. The positive and negative uncoated regions include at least two openings respectively along the laminating direction.