Rechargeable battery

A rechargeable battery that solves a safety problem of a high-capacity of electrode group, that reduces a circuit device and parts that connect cells, that prevents cell swelling, and that prevents leaning of an electrolyte solution is provided. [0002] The rechargeable battery includes a plurality of electrode groups (10) that are housed within a can (40) and that are coupled in parallel, and a spacer (70) that is interposed between the electrode groups to spatially separate neighboring electrode groups.