To provide a bipolar high-frequency instrument for medical treatment for an endoscope which is capable of firmly connecting a pair of elastic opening/ closing members which are provided with electrodes at the respective distal ends and are opened and closed without shaking in the state that electrical insulation is assured within a small space.

The base end segments of a pair of the elastic opening/closing members 2 consisting of conductive materials arranged to the state that these members expand gradually toward the distal sides in such a manner that the members can be narrowed by elastic deformation are integrally fixed to each other as a bundle by tightening the members by means of an electrically insulative tube 5.