A sealing member for bonding the sealed state of the desired region of the living tissues between the two, a treatment instrument for treating biological tissue, in the vicinity of sites which are joined by the sealing member at least I and a retaining member for maintaining a state of contacting the organization. [Selection Figure Figure 3生体組織を治療するための治療用処置具は、少なくとも2つの生体組織同士の所望の領域を封止した状態に接合するための封止部材と、前記封止部材により接合された部位の近傍の組織を接触させた状態に維持する維持部材とを備えている。【選択図】 図3