BATTERY MODULE

A main object of the present disclosure is to provide a battery module capable of restraining heat conductivity among battery cells in rising temperature. The present disclosure achieves the object by providing a battery module including a plurality of a battery cell arranged along with a thickness direction, the battery module including: an elastic member between the battery cell neighboring; a thermally expandable resin composition body is arranged in the elastic member; in a plan view along with the thickness direction, the resin composition body is arranged to include a center of the battery cell; a temperature at which the resin composition body starts to expand is 80° C. or more; and heat conductivity after expansion of the resin composition body is 0.5 W/m·K or less.