treatment portion of the treatment instrument for treating biological tissue of the treatment target by adding energy to the treatment target living tissue, so that it can hold and release the living tissue including the treatment target and the surrounding tissue first and second jaw capable relatively opened and closed with respect to one another, wherein the outer edge of the first and second jaws are respectively provided on the inner side capable of holding the treatment target living tissue, facing each other 1 a first holding portion of the pair, and the pair first grantable energy applying portions of energy for the treatment to the treatment target living tissue is provided on at least one holding portion of the first holding parts respectively provided between the outer periphery of said first and second jaws, the first pair capable of holding the surrounding tissue of the treatment target living tissue in a state of bending to the treatment target living tissue and a second holding part.処置対象の生体組織にエネルギを付加してその処置対象の生体組織を処置するための処置具の処置部は、処置対象及びその周辺組織を含む生体組織を保持及び解放可能なように互いに対して相対的に開閉可能な第1及び第2のジョーと、前記第1及び第2のジョーの外縁よりも内側にそれぞれ設けられ前記処置対象の生体組織を保持可能な、互いに対向する1対の第1の保持部と、前記1対の第1の保持部の少なくとも一方に設けられ前記処置対象の生体組織に処置のためのエネルギを付与可能なエネルギ放出部と、前記第1の保持部と前記第1及び第2のジョーの外縁との間にそれぞれ設けられ、前記処置対象の生体組織の周辺組織を前記処置対象の生体組織に対して曲げた状態で保持可能な1対の第2の保持部とを有する。
