An integrated cartridge, comprising: a main frame (110, 120, 130) composed of a front plate having a plurality of lead passing holes provided in a slit form configured so that electrode leads of a plurality of battery cells arranged in a layered form pass therethrough, and first and second side plates (120, 130) extending at both edges of the front plate in parallel to each other and having a plurality of cell insert slots (121, 131) provided at inner sides thereof, which face each other, so that the plurality of battery cells are capable of being inserted from a free end to the front plate; a cover plate coupled to the first and second side plates to cover the plurality of battery cells arranged in a layered form between the first and second side plates; and a sensing unit mounted to the front plate and configured to be electrically connected to the electrode leads to sense electric characteristics of the plurality of battery cells, wherein the cover plate includes an upper plate, a lower plate and a rear plate connecting edges of the upper plate and the lower plate, wherein the upper plate and the lower plate are parallel to each other, the upper plate and the lower plate extend respectively from opposite edges of the rear plate and are respectively couplable to the first and second side plates through fitting portions provided at top and bottom ends of the first and second side plates so that the upper and lower plates are completely pushable into the fitting portions with both sides of the upper and lower plates fitted therein, thereby the main frame and the cover plate together configure a box forming an outer shape of the integrated cartridge and enclosing the plurality of battery cells when coupled together, wherein the upper plate, the lower plate, the rear plate, the front plate, the first side plate and the second side plate each forming one of the six sides of the box, the rear plate being parallel to the front plate. a main frame (110, 120, 130) composed of a front plate having a plurality of lead passing holes provided in a slit form configured so that electrode leads of a plurality of battery cells arranged in a layered form pass therethrough, and first and second side plates (120, 130) extending at both edges of the front plate in parallel to each other and having a plurality of cell insert slots (121, 131) provided at inner sides thereof, which face each other, so that the plurality of battery cells are capable of being inserted from a free end to the front plate; a cover plate coupled to the first and second side plates to cover the plurality of battery cells arranged in a layered form between the first and second side plates; and a sensing unit mounted to the front plate and configured to be electrically connected to the electrode leads to sense electric characteristics of the plurality of battery cells, wherein the cover plate includes an upper plate, a lower plate and a rear plate connecting edges of the upper plate and the lower plate, wherein the upper plate and the lower plate are parallel to each other, the upper plate and the lower plate extend respectively from opposite edges of the rear plate and are respectively couplable to the first and second side plates through fitting portions provided at top and bottom ends of the first and second side plates so that the upper and lower plates are completely pushable into the fitting portions with both sides of the upper and lower plates fitted therein, thereby the main frame and the cover plate together configure a box forming an outer shape of the integrated cartridge and enclosing the plurality of battery cells when coupled together, wherein the upper plate, the lower plate, the rear plate, the front plate, the first side plate and the second side plate each forming one of the six sides of the box, the rear plate being parallel to the front plate.