A rechargeable battery that improves a vibration-proof property is provided. The rechargeable battery includes: an electrode assembly including a positive electrode, a negative electrode, and a separator that is disposed between the positive electrode and the negative electrode, a case that houses the electrode assembly, and a cap assembly including terminals that are coupled to the case and that are electrically connected to the electrode assembly, wherein the terminal has a lead tab that is electrically connected to the electrode assembly and a vibration-proof member is installed between the lead tab and the case.