PURPOSE: To provide a device in which a convergence speed is accelerated and with excellent stability in the device canceling a noise in a car with a sound generated from a speaker and reducing the noise.

CONSTITUTION: A reference signal based on an engine revolving speed is filter- weighted in a filter part 12 so that the noise in the car is canceled, and a speaker 15 is driven based on the signal. The sound generated from the speaker 15 and the noise in the car are detected by a microphone 16. The updating amount of the filter weight is calculated so that the detection amount becomes minimum, and the filter weight at the time of the last control period is corrected. At the time of the updating, a correction coefficient is calculated by a correction coefficient calculation part 18. The correction coefficient is set to a value in proportion to the last filter weight revision amount from the filter weight revision amount before last. Thus, when the revision amount is larger, the convergence sped is increased, and when smaller, the stability is improved.