A battery module comprising: a secondary battery unit including a plurality of secondary batteries (111, 112, 113, 114), the plurality of secondary batteries (111, 112, 113, 114) each including electrode terminals (11, 12) and a safety vent which are arranged on one side of the secondary battery unit; characterized in that the battery module further comprises: a compression plate wrapping at least a portion of the secondary battery unit and compressing the secondary battery unit together, wherein the compression plate comprises: an upper compression plate compressing the secondary battery unit while covering the top portion of the secondary battery unit; and a lower compression plate combined with the upper compression plate and compressing the secondary battery unit while covering the bottom portion of the secondary battery unit, wherein ends of the upper compression plate are bent stepwise, and ends of the lower compression plate are welded to the ends of the upper compression plate such that the ends of the lower compression plate are on interior sides of the ends of the upper compression plate; and an insulation cover covering the electrode terminals (11, 12) and the safety vent, the insulation cover including a duct connected to the safety vent to guide gases exhausted from the safety vent to a first location, and a vent hole member coupled to the duct at the first location, wherein the duct comprises a duct groove connected to the safety vent and a duct cover member covering the duct groove and combined with the insulation cover, and wherein the duct is integrally formed with the insulation cover by the duct groove and the duct cover member. a secondary battery unit including a plurality of secondary batteries (111, 112, 113, 114), the plurality of secondary batteries (111, 112, 113, 114) each including electrode terminals (11, 12) and a safety vent which are arranged on one side of the secondary battery unit; characterized in that the battery module further comprises: a compression plate wrapping at least a portion of the secondary battery unit and compressing the secondary battery unit together, wherein the compression plate comprises: an upper compression plate compressing the secondary battery unit while covering the top portion of the secondary battery unit; and a lower compression plate combined with the upper compression plate and compressing the secondary battery unit while covering the bottom portion of the secondary battery unit, an upper compression plate compressing the secondary battery unit while covering the top portion of the secondary battery unit; and a lower compression plate combined with the upper compression plate and compressing the secondary battery unit while covering the bottom portion of the secondary battery unit, wherein ends of the upper compression plate are bent stepwise, and ends of the lower compression plate are welded to the ends of the upper compression plate such that the ends of the lower compression plate are on interior sides of the ends of the upper compression plate; and an insulation cover covering the electrode terminals (11, 12) and the safety vent, the insulation cover including a duct connected to the safety vent to guide gases exhausted from the safety vent to a first location, and a vent hole member coupled to the duct at the first location, wherein the duct comprises a duct groove connected to the safety vent and a duct cover member covering the duct groove and combined with the insulation cover, and wherein the duct is integrally formed with the insulation cover by the duct groove and the duct cover member.