A battery module is provided. The battery module includes a battery stack that has a plurality of secondary batteries stacked on each other in multiple stages along a predetermined stack direction. Additionally, the battery module includes at least one cooling fin which has a contact part disposed to contact at least one of the secondary batteries and a fitting part that extends from the contact part to expose at least a portion of the fitting part to the exterior of the battery stack. A cooling channel which has at least one fitting groove is provided and the fitting part is fitted into the fitting groove.