Disclosed is a battery module, as well as a battery pack and a vehicle comprising the same. The battery module includes a plurality of battery cells, each having an accommodation portion in which an electrode assembly is accommodated and a sealing portion for sealing the accommodation portion, thermal-conductive sheets configured to surround at least a part of the battery cells in surface contact with the battery cells, side cooling fins located at an inner side of the thermal-conductive sheets and at least partially in contact with the accommodation portions of the battery cells, and a cooling plate in contact with the thermal-conductive sheet.