A rechargeable battery includes an electrode assembly including a first electrode, a separator, and a second electrode, a case that accommodates the electrode assembly, a first lead terminal and a second lead terminal that are respectively connected to the first electrode and the second electrode of the electrode assembly, the first and second lead terminals being drawn out of the case, and a fixing member that surrounds the first lead terminal and the second lead terminal, wherein each of the first lead terminal and the second lead terminal includes a first region and a second region on opposite sides of the fixing member, a width of the first region and a width of the second region being different.