Patent attributes
An object of the present invention is to provide a vehicle body bottom structure capable of more reliably protecting a battery pack at a time of a side collision of a vehicle. A vehicle body bottom structure of the present invention includes a battery pack disposed below a floor panel, a side sill extending in a vehicle front-rear direction outside in a vehicle width direction and a battery side frame allowing the side sill to support the battery pack, wherein the battery side frame has a lower surface positioned outside in the vehicle width direction and positioned lower than a support portion for the battery pack, the support portion being formed inside in the vehicle width direction of the battery side frame.