A pedaling aid is combined with an acoustic piano, and assists a physically handicapped person in performing a piece of music on the acoustic piano; the pedaling aid includes a human interface, a pedal actuator and a controller, and the pedal actuator is equipped with a locator and a coupling device; a user moves the pedal actuator in the vicinity of the acoustic piano, and couples the pedal actuator to the acoustic piano at a proper position with the assistance of the locator and coupling device; while the physically handicapped person is fingering on the acoustic piano, the human interface is kept around the head so that the physically handicapped person manipulates the human interface with the chin, mouth, teeth or tongue; since the human interface produces a signal representative of a target position, the controller makes the pedal actuator to move the pedal to the target position.