Abstract: A dog barking restraining device in which an impulse wave is applied to the neck of a dog when the dog barks to thereby refrain the dog from barking. The device includes a battery, a piezoelectric sensor for detecting a vibration signal generated from a vocal chord of a dog when the dog barks, a control unit for receiving a signal of the vocal chord of the dog detected by the piezoelectric sensor to discriminate whether or not to shock the dog, a transformer for generating a stepped up impulse wave of thousands of volts, a variable resistor for adjusting the strength (power) of the impulse wave output from the transformer, and a pair of electrodes for applying to the neck of the dog the impulse wave generated by the transformer.