A lithium polymer battery where the corrosion or the electrical short resulting from contact of the metal film of the cut region of external material with the connecting lead or the terminal of the adjacent protective circuit cover can be prevented. The lithium polymer battery comprises: a chargeable and dischargeable bare cell; a protective circuit cover installed on one side surface of the bare cell so as to be electrically coupled to the bare cell; and a holder cap installed between the protective circuit cover and the bare cell so as to block contact between the bare cell and a terminal of the protective circuit cover.