An apparatus for iontophoresis

An iontophoresis device is provided to improve the user's skin by diagnosing the skin state of a user and then performing iontophoresis by using the optimal amount of current suitable for the skin state. The iontophoresis device comprises plural electrodes(301,302) installed in a mask or a patch(300) attached to the user's skin and an iontophoresis module chip(200) detachable from the mask or the patch and electrically coupled with the electrode. The iontophoresis module chip is composed of a wireless charging unit(210) charging power in a contactless charging method; a microprocessor(220) operated by receiving the power from the wireless charging unit to store a control program; a control drive(240) controlling voltage, frequency, and the amount of current applied to the electrode according to a command of the microprocessor; an output unit(250) connected to the control drive to transmit constant current to the electrode; a skin diagnosing and measuring unit(262) connected to the output unit to receive a bionic impedance value of the user measured from the electrode; and an A/D(Analog To Digital) converter(270) converting analog data detected from the skin diagnosing and measuring unit, into digital data and then inputting the digital data into the microprocessor.