Provided is a secondary battery, which has increased reliability by providing a stable connection structure of a temperature sensitive element. The secondary battery includes an electrode assembly formed by winding a positive electrode plate, a negative electrode plate and a separator and including a pair of lead tabs drawn from the positive electrode plate and the negative electrode plate, a pouch sealing the electrode assembly and including a terrace portion exposing the lead tabs to the outside, a temperature sensitive element formed in the terrace portion and electrically connected to the lead tabs, and a movement preventing tape formed in the terrace portion to cover the temperature sensitive element.