A closing device according to the present invention includes a protruding member detachably provided at a distal end portion of a long shaft member, a pair of gripping members rotatable with respect to the protruding member, and a first member connected to the pair of gripping members. A first linear member, a second linear member, and a holding portion that is detachably provided at a distal end portion of the long shaft member, and has an action portion that acts in a direction in which the pair of gripping members approach the protruding member. It has.本発明に係る閉孔器は、長軸部材の先端部に着脱自在に設けられた突出部材と、突出部材に対して回動可能な一対の把持部材と、一対の把持部材に接続された第一及び第二の線状部材と、突出部材に対して一対の把持部材が近づく方向に力を作用する作用部を有し、長軸部材の先端部に着脱自在に設けられた保持部と、を具備している。
