A battery unit with improved safety measures, a lithium polymer battery using the battery unit, and a method for manufacturing the lithium polymer battery are provided. The lithium polymer battery has a battery unit and a case accommodating the battery unit, wherein the battery unit includes: a cathode plate having a cathode collector and a cathode active material layer coated on at least one surface of the cathode collector; a cathode lead electrically connected to the cathode collector; an anode plate having an anode collector and an anode active material layer coated on at least one surface of the anode collector; an anode lead electrically connected to the anode collector; a separator interposed between the cathode plate and the anode plate, which insulates the cathode plate and the anode plate from each other; and an insulating member formed on at least one of the cathode lead and the anode lead, which prevents a short circuit between the cathode lead and the anode plate or between the anode lead and the cathode plate. In the battery unit, the cathode plate, the separator, and the anode plate are sequentially and repeatedly stacked upon one another. Therefore, the insulating member incorporated in the lithium polymer battery can enhance the safety of the battery.