<p>A device for hyperthermia comprising
a first electrode adapted to be disposed in a tract organ of a living body anda second electrode adapted to be disposed on an outer circumference of the living body such that the second electrode is opposed to the first electrode so as to generate a spatially inhomogeneous electric field within the living body in cooperation with the first electrode so that a part of the living body near the first electrode may be heated more strongly than a part of the living body near the second electrodeserves for selectively heating a tumor or malignancy region at the deep inside of the living body by a noninvasive technique.</p>
