BATTERY CASE AND BATTERY CASE CROSS MEMBER

A battery case for being mounted under a floor of a vehicle body and storing a battery includes: a main body formed of a bottomed frame body having side walls facing each other in a vehicle width direction in a state of being mounted on the vehicle body; and a battery case cross member configured to extend between the facing side walls in the main body and to reinforce the main body. The battery case cross member includes a hat-shaped section part including a top portion, side wall portions, and flange portions, the flange portions abutting on a bottom surface of the main body, a resin patched on or coating a full length of an inner surface and/or outer surface of the hat-shaped section part, and a reinforcement arranged to cover the resin and adhered to the resin.