Abstract: A vibration control device for a sewing machine capable of actively reducing the vibration generated on a bed of the sewing machine by the rotation of an arm shaft, the vertical reciprocation of a needle bar, and other vibration inducing movement without reducing a mechanical strength of the sewing machine and adopting any complex designs. The vibration control device includes a sync signal generating device for generating a sync signal in synchronism with rotation of the arm shaft, a vibration sensor for detecting vibration generated on the bed, a control unit for setting a transfer function, and a piezoelectric actuator for generating control vibration. A control signal interfering with the vibration detected by the vibration sensor is generated by the control unit so as to minimize a detection signal from the vibration sensor according to the sync signal, the detection signal, and the transfer function.