Vehicle body lower structure of vehicle

It is intended to provide a vehicle body lower structure capable of preventing a backflow component from flowing outside the vehicle from a rear wheel housing at the shortest distance. The vehicle body lower structure of a vehicle comprising a rear wheel housing and a mud guard integrally attached to an inner surface of a rear portion of the rear wheel housing wherein the mud guard has a plate-shaped shielding portion extending from a vehicle width directional inner side of a rear edge of the rear wheel housing toward a front side of the vehicle, and wherein the shielding portion has an up-down directional length extending from a bottom portion of the mud guard to a position above at least a tail pipe whose outlet portion is oriented toward a rear surface of a vehicle body adjacent thereto.