A treatment device (1) for electric arc treatment is provided comprising: power supply means (2), control means (3) for controlling the treatment device (1), command means (4) for commanding the treatment device (1), designed to allow a user to command it, a treatment electrode (5) arranged at least partially in contact with the external environment, the power supply means (2) supplying said treatment electrode (5) with alternating electric current having frequencies ranging between 30 kHz and 50 kHz, so as to create an electric potential difference between said treatment electrode (5) and a reference electrode (6) electrically connected to a treated portion, so as to create an electric arc between said treated portion and said treatment electrode (5), the command means (2) being designed to activate and deactivate the supply of electric current to the treatment electrode (5) with a period ranging between 0.5 ms and 20 ms and a duty cycle ranging between 0.02 and 0.8.
