A battery module according to an exemplary embodiment of the present invention includes: a plurality of rechargeable batteries; a housing incorporating the rechargeable batteries; and a plurality of protrusions allowing the rechargeable batteries to be spaced from each other in order to acquire a stable cooling function, wherein the rechargeable batteries are stacked and arranged to form a plurality of battery arrays and the battery arrays stacked in a flow direction of the cooing medium are different from each other in the number of protrusions located between the rechargeable batteries.