Provided are a pouch-type flexible film battery and a method of manufacturing the same. The film battery includes a cathode structure including a cathode pouch, a cathode conductive carbon layer, and a cathode layer, an anode structure including an anode pouch, an anode conductive carbon layer, and an anode layer, and a polymer electrolyte layer between the cathode and anode structures. The polymer electrode layer may be a gel-type electrolyte including a cellulose-based polymer.