Braking force controller of vehicle

A braking force controller of a vehicle capable of preventing an original braking pressure from being unnecessarily increased when a braking force increase suppressing control is started during a brake assist control without impairing a braking force increase effect when only the brake assist control is performed. When the brake assist control is started, additional pressures Pcf and Pcr from the original braking pressures of front and rear wheels to a master cylinder pressure Pm are increased to control the braking pressures on the front and rear wheels to pressures higher than the master cylinder pressure Pm. However, when anti-skid control is performed for the right and left front wheels or right and left rear wheels during the brake assist control, when the anti-skid control is performed for one of the right and left front wheels and a yaw direction behavior control is performed for the other, or when a braking force distribution control is performed, an increase in the original braking pressures on the front wheels or rear wheels can be suppressed.