PURPOSE: To make elimination of a periodic noise stably keepable at all times, by making a correction factor so as to be determined according to brakingness in a vehicle.

CONSTITUTION: The value of a correction value factor α available for producing a noise component is determined on the basis of the discriminated result of a braking discriminating device 7 discriminating this value as braking of a vehicle. Therefore, when the vehicle is in braking, that is, when the noise component being produced for elimination of a periodic noise gets out of order and elimination of the periodic noise out of a detection torque signal d(t) will not go on smoothly, the value of the correction factor α is altered to value within a small value range where substantially has no effect on the producing the noise component whereby correction of the noise component is prohibited, or a degree of this correction can be made so as to be reduced. In consequence, even if braking motion of the vehicle is repeated, stable noise elimination is kept up and, what is more, shift control over a power train is accurately performable.