Iontophoresis apparatus

An iontophoresis device comprising (A) a working electrode assembly having a working electrode, a medicine-containing portion and an ion-exchange membrane, (B) a counter electrode assembly having an electrode which opposes said working electrode, and (C) a power source unit electrically connected to the working electrode assembly and to the counter electrode assembly, enabling an ionic medicine contained in said medicine containing portion to be permeated into a living body by electrophoresis through the ion-exchange membrane,

• wherein:
• said ion-exchange membrane has a structure in which voids of a porous film are filled with an ion-exchange resin;
• the ion-exchange membrane enables permeation of ions having the same polarity as that of the ionic medicine;
• the porous film comprises a polyolefin resin;
• and
• the voids in the porous film pierce through from the front surface to the back surface of the film.