US Patent 10099725 Vehicle body side structure

A vehicle body side structure includes: a side sill extending in a longitudinal direction of a vehicle at a side bottom of the vehicle and having a recess sagging inward in a width direction of the vehicle; a door being hollow, having a door bottom portion disposed so as to overlap the side sill when seen from a side, and being arranged at an outer side of the side sill in the width direction; and a force transferring member having a projection protruding inward in the width direction, being disposed in a hollow interior of the door bottom portion, and being configured to transfer force acting inward in the width direction to the side sill.