An organ type accelerator pedal assembly may include a vibration generating module coupled to a carrier connected with a foot plate, and engaged with a first actuator through a power transfer member to bring a vibration to the carrier, a pushing-force generating module actuated by a second actuator and movably disposed under the vibration generating module to provide a pushing-force to the foot plate when contacting with the vibration generating module, and/or a control unit controlling the first actuator and/or the second actuator.