BATTERY PACK

A battery pack includes a battery module in which a plurality of battery cells are stacked, a battery case accommodating the battery module, and a battery cooling mechanism configured to cool the battery module. The battery cooling mechanism includes an air guide duct disposed in a first direction orthogonal to a stacking direction of the plurality of battery cells with respect to the battery module, and a cooling fan disposed on a side opposite to the air guide duct with the battery module interposed therebetween in the first direction. An air intake port of the cooling fan is open on a side opposite to the battery module in the first direction.