Provided is a battery module. The battery module includes a first cooling tube, a second cooling tube connected to the first cooling tube and arranged on a different plane than the first cooling tube, and a branching portion connecting the first cooling tube to the second cooling tube, wherein the branching portion includes a lower connection tube connected to the first cooling tube, an upper connection tube connected to the second cooling tube, and a connection member into which one of the lower connection tube and the upper connection tube is inserted, the connection member being inserted into the other of the lower connection tube and the upper connection tube.