A vehicle drive system testing apparatus adapted to test a vehicle drive system by connecting a load device (2, 3) to the vehicle drive system and applying a load to the vehicle drive system, comprising: a first load device and a second load device; a control device adapted to control the first and second load devices (2, 3); a steering wheel adapted to input a handle operation amount corresponding to a handle operation of a vehicle; an accelerator pedal adapted to input an accelerator operation amount corresponding to an accelerator operation of the vehicle; a brake pedal adapted to input a brake operation amount corresponding to a brake operation of the vehicle; and a control part adapted to control the load device (2, 3) based on the operation amounts simultaneously inputted by at least two of the steering wheel, the accelerator pedal and the brake pedal wherein the first load device is connectable to a first output shaft of the vehicle drive system to which one of left and right wheels or one of front and rear wheels is connected and the second load device is connectable to a second output shaft of the vehicle drive system to which the other of the left and right wheels or the other of the front and rear wheels is connected in the vehicle drive system, characterized in that the control part is adapted to control the first load device and the second load device based on the handle operation amount so as to simulate a revolution number difference and/or torque difference caused between the two wheels, and based on relationship-associated data being indicative of a relationship between the handle operation amount and the revolution number difference and/or torque difference at a preset command value. a first load device and a second load device; a control device adapted to control the first and second load devices (2, 3); a steering wheel adapted to input a handle operation amount corresponding to a handle operation of a vehicle; an accelerator pedal adapted to input an accelerator operation amount corresponding to an accelerator operation of the vehicle; a brake pedal adapted to input a brake operation amount corresponding to a brake operation of the vehicle; and a control part adapted to control the load device (2, 3) based on the operation amounts simultaneously inputted by at least two of the steering wheel, the accelerator pedal and the brake pedal wherein the first load device is connectable to a first output shaft of the vehicle drive system to which one of left and right wheels or one of front and rear wheels is connected and the second load device is connectable to a second output shaft of the vehicle drive system to which the other of the left and right wheels or the other of the front and rear wheels is connected in the vehicle drive system, characterized in that the control part is adapted to control the first load device and the second load device based on the handle operation amount so as to simulate a revolution number difference and/or torque difference caused between the two wheels, and based on relationship-associated data being indicative of a relationship between the handle operation amount and the revolution number difference and/or torque difference at a preset command value.