A handling-convenient device for iontophoresis, which can supply spotted regions suffering from disease with a proper quantity of current at the same time. The device for iontophoresis includes a power source apparatus having a plurality of output terminals outputting currents of predetermined values adjusted by a plurality of current control circuits, respectively, and a plurality of connecting cords, each cord being connected with one of the output terminals of the power source apparatus at one end thereof and being connected with an electrode structure at the other end. The connecting cords are attached with the power source apparatus in a mutually attachable/detachable fashion via connection terminals. The power source apparatus has an LED located thereon to notify of the energization status of the device and a power switch externally located thereon to control starts and stops of the apparatus.