A secondary battery includes an electrode assembly having a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate,a first electrode terminal,a first collecting plate having a first region contacting the first electrode plate or the second electrode plate, a second region extending at an angle to the first region, and a first reinforcement part that extends at an angle to both the first region and the second region,a case housing the electrode assembly and the first collecting plate,and a cap assembly sealing the case.