A battery module according to an embodiment of the present disclosure includes a battery cell assembly including a plurality of battery cells; a module housing having an internal space in which the at least one battery cell assembly is received; and a cooling unit disposed on a side of the battery cell assembly, wherein the cooling unit includes a first cooling plate and a second cooling plate spaced apart from the first cooling plate to form a coolant channel, the second cooling plate being positioned closer to the battery cell assembly than the first cooling plate, and at least part of the second cooling plate has a patterned portion.