PROBLEM TO BE SOLVED: To perform securement of a treatment space through exclusion of organs and ejection of aerosol simultaneously.SOLUTION: An exclusion device 10 includes: a long and thin insertion part 3 capable of being inserted into the living body cavity an exclusion part 4 which is set at the tip of the insertion part 3 and has an exclusion surface 6A arranged touching the surface of the organs in the body cavity and a suction surface 6B having a suction port 6b opening a suction passage 7 having the suction port 6b at the tip and extends to the base end side of the insertion part 3 and a suction part 2 which is arranged in the side near the base end of the insertion part 3 to suck inside of the suction passage 7. And the exclusion surface 6A and the suction surface 6B face in a mutually different direction.COPYRIGHT: (C)2015,JPO&INPIT【課題】臓器の圧排による処置空間の確保と煙霧の排出とを同時に行う。【解決手段】生体の体腔内に挿入可能な細長い挿入部3と、該挿入部3の先端に設けられ、体腔内の臓器の表面に接触して配置される圧排面6Aと、吸引口6bが開口する吸引面6Bとを備える圧排部4と、吸引口6bを先端に有し、挿入部3の基端側まで延びる吸引通路7と、挿入部3の基端側に配置され、吸引通路7内を吸引する吸引部2とを備え、圧排面6Aおよび吸引面6Bが、互いに異なる方向に面している圧排装置10を提供する。【選択図】図1