A pouch type secondary battery includes a pouch having a receiving part receiving an electrolyte therein and a sealing part formed by sealing an outer circumference of the receiving part in order to seal the receiving part and an electrode tab connected to one side of the pouch so as to be protruded, and at least one partition provided between at least two pouch type secondary batteries. The partition comprises: an electrode tab supporting part supporting the electrode tab; a frame extended from the electrode tab supporting part, supporting the sealing part, and having the receiving part inserted thereinto; and a buffering pad attached to an inner side of the frame at which the receiving part is seated so as to be disposed between the frame and the receiving part. The buffering pad has a cross-sectional shape in which one side of a rectangular frame is opened.