PURPOSE: To provide superior convenience for use, to penetrate a high frequency to the wide range of the human body, to easily perform output adjustment, and to easily abut a flat plate on different affected parts.

CONSTITUTION: Plural antenna wires 2 coated with insulating material are arranged almost parallel with the flat plate 1 having flexibility capable of winding across the affected part cylindrically. Both terminal parts 1a, 1b of the flat plate 1 are connected in such a way that they can be mounted/ dismounted freely by a mechanical connecting means 3. The plural antenna wires 2 can be connected in helical shape by an electric connecting means 4. The two open terminals 5, 6 of the helical antenna wires 2 are connected to an input terminal 8 and an output terminal 9 attached on the flat plate 1, respectively. In this way, the wide range of the human body can be irradiated with a high frequency electromagnetic field.