The present invention provides a battery module including: a battery cell laminate in which a plurality of battery cells having a structure in which an electrode assembly is inside a sealed battery case with an electrolyte solution are arranged with the sides being in contact with each other; and a cooling/buffering member, mounted beneath the battery cell laminate to support a load of the battery cell laminate, and formed of a porous structure to emit heat generated from the battery cell laminate during a charge and discharge process down the battery cell laminate.