BATTERY INSTALLATION STRUCTURE

A plurality of batteries (3) are disposed under a floor panel (16) of a vehicle (1). A first battery unit (38F) comprising a plurality of batteries (3) stacked in a vertical direction and a second battery unit (38R) comprising a plurality of batteries (3) stacked in a vehicle transverse direction are provided. By arranging a layout of the first battery unit (38F) and the second battery unit (38R) considering the location of an electric equipment (12, 13, 14) to which the batteries (3) supply power as well as the location of passenger seats (32F, 32R), the weight balance of the vehicle (1) in the front-aft direction can be optimized.