The pouch-type lithium secondary battery includes an electrode assembly; a pouch for accommodating the electrode assembly; and a variable tab in electrical connection with one electrode tab of two electrode tabs of the electrode assembly and being parallel to the other electrode tab and being drawn outward from the pouch, wherein the position of the variable tab is adjustable with respect to the electrode tab in electrical connection therewith. Therefore, the present invention is capable of achieving easy positional adjustability of an electrode tab protruding outward from the pouch, during a battery assembly process. In addition, the present invention is capable of taking prompt measures in response to consumer demands by improving the design freedom of a battery pack particularly in a large-area battery.