A vehicle body structure is provided to avoid the damage to a battery pack due to invasion of an electric device in a side impact crash. The vehicle body structure includes a battery pack on its inner side in a vehicle width direction, and an electric device on its outer side. A No1 seat cross member 5 is provided along in the vehicle width direction of the floor panel 3. The No1 seat cross member 5 is provided with a weak portion 54 in a position in the vehicle width direction corresponding to between the battery pack 2 and an electric hot-water heater 9 as the electric device.