Treatment device using energy

A treatment device which applies energy to a living tissue of a treatment target to treat the living tissue, the treatment device comprising a treatment portion, the treatment portion including:

• a pair of jaws which are openable and closable relative to each other to hold and release the living tissue of the treatment target including peripheral tissues;
• an energy emitter which is provided in at least one of the pair of jaws and which is configured to emit energy to the living tissue of the treatment target;
• a base which is provided between one of the pair of jaws that is provided with the energy emitter and the energy emitter and which has electric insulation to cut off the flow of electricity from the energy emitter to the jaws;
• an outer edge which is provided in at least one of the pair of jaws to hold the peripheral tissues of the living tissue of the treatment target when the pair of jaws are closed;
• a first channel as a depression formed by the cooperation of the energy emitter, the base, and the outer edge on the side of one of the jaws that is provided with the energy emitter facing the other jaw, into which fluid emanating from the living tissue of the treatment target by the energy emitted from the energy emitter is configured to flow into the first channel;
• second channels which are provided in the jaw provided with the first channel and which are provided between the base and the outer edge;
• a third channel which is provided in the jaw provided with the first and second channels and which is provided between the outer edge and the energy emitter to allow the fluid emanating from the living tissue to flow toward the first channel;
• and
• a support portion which discretely couples the base to the outer edge so that the fluid emanating from the living tissue flows into the first channel from the third channel through the second channels and then the fluid is confined, the support portion supporting the living tissue to prevent the living tissue from coming into the first channel when the living tissue is held between the pair of jaws.