A battery pack includes a heat conductive member that has heat conductivity and is provided between a plurality of battery modules which are adjacent to each other in a width direction. A heat dissipation unit dissipates heat conducted to the heat conductive member. A bus bar for modules is provided on one side of the battery modules in a height direction. The heat conductive member includes a contact portion and an extended portion. The contact portion is in contact with the plurality of battery modules which are adjacent to each other in the width direction. The extended portion extends from a side opposite to the bus bar for modules of the battery modules in a height direction and is connected to the heat dissipation unit.