A pair of rear floor frames extend in a fore-and-aft direction in a lower part of a vehicle body. A pair of rear horizontal frames extend in the fore-and-aft direction above corresponding rear wheels. A door beam extends in the fore-and-aft direction in each side door in alignment with the corresponding rear horizontal frame. A pair of rear vertical frames each extend vertically behind the corresponding rear wheel and join rear ends of the corresponding rear floor frame and rear horizontal frame to each other. In a rear end crash with a vehicle having a front bumper at a relatively high position, the rear vertical frames allow the impact energy of the rear end crash to be evenly distributed, and deformation of the passenger compartment is minimized. The rear horizontal frames allow the impact energy to be transmitted to the door beams, contributing to reinforcement of the passenger compartment.