A secondary battery includes an electrode assembly having a first electrode plate, a second electrode plate and a separator interposed therebetween. A pouch case includes an accommodating portion for accommodating the electrode assembly and a cover portion for sealing the accommodating portion. A reinforcing member is formed between the pouch case and the electrode assembly. In the secondary battery, the reinforcing member includes a first frame formed along one surface of the pouch case, which comes in contact with the electrode assembly, a support portion formed in form of a plate while being spaced apart from the first frame, and a second frame to connect the first frame and the support portion to each other.