An active sound effect generation system includes: an intake pipe microphone for detecting a vibration noise signal produced in an intake pipe of an internal combustion engine; a driver seat speaker for outputting a sound including a sound effect, and an active sound effect generation device. The active sound effect generation device includes: a reference signal generator for extracting an acoustic component belonging to a predetermined frequency band based on a rotational frequency of the engine from the vibration noise signal, and generating a harmonic reference signal based on the extracted acoustic component; and an adder for generating a control signal to be used to generate the sound effect on the basis of the reference signal, and outputting the control signal to the driver seat speaker. The reference signal generator sets a center frequency for the acoustic component based on the rotational frequency of the engine.