An active control method for controlling a pedal effort for an accelerator, may include determining, in a vehicle velocity determining step, whether a vehicle velocity is in 0 (zero) state while the vehicle provided with an accelerator an pedal effort of which is controllable starts-on; determining, in a shifting stage determining step, whether the current shifting stage is on a neutral state or a parking state when it is determined that the vehicle velocity has been in 0 (zero) state in the vehicle velocity determining step; and controlling, in a pedal effort increasing control step, a current pedal effort to increase to a set target pedal effort when it is determined that the current shifting stage has been on the neutral stage or the parking stage in the shifting stage determining step.