A motor control device for driving a two-phase synchronous motor , the motor control device comprising: control current waveform generating means (70-73, 76-77) which generates a control current waveform by superposing a fundamental sinusoidal wave and a reluctance torque correction waveform that suppresses fluctuation of a reluctance torque of the two-phase synchronous motor ; and current control signal generating means which generates a current control signal for supplying a current to windings of the two-phase synchronous motor according to the control current waveform generated by the control current waveform generating means (70-73, 76-77), characterized in that the reluctance torque correction waveform has a waveform profile obtained by full-wave-rectifying an original waveform to the same sign as or a different sign from that of the fundamental sinusoidal wave, the original waveform having a frequency twice that of the fundamental sinusoidal wave and having a phase matched with that of the fundamental sinusoidal wave, the reluctance torque correction waveform has a waveform profile such that the original waveform is full-wave-rectified to the same sign as that of the fundamental sinusoidal wave when an amplitude of an angle-differentiated self-inductance of the two-phase synchronous motor is greater than an amplitude of an angle-differentiated mutual inductance of the two-phase synchronous motor , and the reluctance torque correction waveform has a waveform profile such that the original waveform is full-wave-rectified to the different sign from that of the fundamental sinusoidal wave when the amplitude of the angle-differentiated self-inductance of the two-phase synchronous motor is smaller than the amplitude of the angle-differentiated mutual inductance of the two-phase synchronous motor . control current waveform generating means (70-73, 76-77) which generates a control current waveform by superposing a fundamental sinusoidal wave and a reluctance torque correction waveform that suppresses fluctuation of a reluctance torque of the two-phase synchronous motor ; and current control signal generating means which generates a current control signal for supplying a current to windings of the two-phase synchronous motor according to the control current waveform generated by the control current waveform generating means (70-73, 76-77), characterized in that the reluctance torque correction waveform has a waveform profile obtained by full-wave-rectifying an original waveform to the same sign as or a different sign from that of the fundamental sinusoidal wave, the original waveform having a frequency twice that of the fundamental sinusoidal wave and having a phase matched with that of the fundamental sinusoidal wave, the reluctance torque correction waveform has a waveform profile such that the original waveform is full-wave-rectified to the same sign as that of the fundamental sinusoidal wave when an amplitude of an angle-differentiated self-inductance of the two-phase synchronous motor is greater than an amplitude of an angle-differentiated mutual inductance of the two-phase synchronous motor , and the reluctance torque correction waveform has a waveform profile such that the original waveform is full-wave-rectified to the different sign from that of the fundamental sinusoidal wave when the amplitude of the angle-differentiated self-inductance of the two-phase synchronous motor is smaller than the amplitude of the angle-differentiated mutual inductance of the two-phase synchronous motor . <EOS>