The present invention relates to a high-frequency heat therapy electrode device, and one embodiment of the present invention provides a high-frequency heat therapy electrode device provided with an electrode needle disposed in front of a handle, which necrotizes a lesion site by cauterizing the site by means of the high-frequency heat generated from the electrode needle. The high-frequency heat therapy electrode device equipped with a flexible tube is characterized in that: a flexible tube of a prescribed hardness, but that can be easily bent and deformed, is disposed between the handle and the electrode needle such that the needle can be inserted, along the working channel of an endoscope, up to a lesion site and the electrode needle is provided with a cooling line in the inside thereof.
