A battery module configured to have a structure in which a plurality of unit modules , each of which comprises more than one battery cell , is arranged in a lateral direction comprising: a cooling member mounted at a top or a bottom of the battery module to remove heat generated from the battery cells during charge and discharge of the battery cells , and cooling fins disposed between the respective unit modules in a state in which opposite sides of each of the cooling fins are in tight contact with corresponding ones of the unit modules , wherein the cooling member comprises: a thermal conduction member disposed at the top or the bottom of the battery module , the thermal conduction member comprising an upper plate and a lower plate , which are separated from each other; and a coolant conduit comprising a first conduit and a second conduit configured to have a hollow structure in which a coolant flows, the first conduit being disposed between the upper plate and the lower plate , the second conduit being integrally connected to the first conduit , the second conduit being disposed at a front and/or a rear of the battery module , and wherein the first conduit comprises two or more pipes, wherein second conduits are disposed at the front and the rear of the battery module , wherein each of the battery cells is a plate-shaped secondary battery , and wherein the plate-shaped secondary battery is a pouch-shaped secondary battery configured to have a structure in which an electrode assembly of a cathode/separator/anode structure is mounted in a battery case formed of a laminate sheet comprising a resin layer and a metal layer, characterized in that the cooling fins are bent such that the cooling fins contact the thermal conduction member in a surface contact fashion, and each of the cooling fins is formed in a "┐" shape in vertical section and formed of a heat conductive metal plate. a cooling member mounted at a top or a bottom of the battery module to remove heat generated from the battery cells during charge and discharge of the battery cells , and cooling fins disposed between the respective unit modules in a state in which opposite sides of each of the cooling fins are in tight contact with corresponding ones of the unit modules , a thermal conduction member disposed at the top or the bottom of the battery module , the thermal conduction member comprising an upper plate and a lower plate , which are separated from each other; and a coolant conduit comprising a first conduit and a second conduit configured to have a hollow structure in which a coolant flows, the first conduit being disposed between the upper plate and the lower plate , the second conduit being integrally connected to the first conduit , the second conduit being disposed at a front and/or a rear of the battery module , and wherein the first conduit comprises two or more pipes, wherein second conduits are disposed at the front and the rear of the battery module , wherein each of the battery cells is a plate-shaped secondary battery , and wherein the plate-shaped secondary battery is a pouch-shaped secondary battery configured to have a structure in which an electrode assembly of a cathode/separator/anode structure is mounted in a battery case formed of a laminate sheet comprising a resin layer and a metal layer, characterized in that the cooling fins are bent such that the cooling fins contact the thermal conduction member in a surface contact fashion, and each of the cooling fins is formed in a "┐" shape in vertical section and formed of a heat conductive metal plate. <EOS>