The suture pushing device (1), one end with suturing the body tissue Parts and suture the other end is led outside the body through a natural opening in the (S), and a suture pushing apparatus to move the connecting portion formed between said one end portion the other end portion to the stapling portion of the tissue Te, comprising an outer tube having flexibility (10), rod-shaped body which is inserted so as to advance and retreat in the outer cylinder (10) which has a flexible and (20), and the outer cylinder (10) on the distal end side, the opposite pair of side holes (11, 12) to each other is formed so as to pass through the sutures (S), the outer to the inner circumferential surface at the tip end of the outer cylinder (10) cylindrical engaging portion extending in the axial direction (10) (13) is formed on the outer peripheral surface of the rod-shaped body (20), said engaging portion as well as engaging the engaging portion (13) (13) engaged portion that slides along the (24) is formed.この縫合糸押し込み装置(1)は、体内の組織を縫合するとともに一端部および他端部が自然開口を通して体外に導かれた縫合糸(S)において、前記一端部と前記他端部とで形成した接続部を前記組織の縫合部まで移動させる縫合糸押し込み装置であって、可撓性を有する外筒(10)と、可撓性を有するとともに前記外筒(10)に進退するように挿通された棒状体(20)と、を備え、前記外筒(10)の先端側には、互いに対向する一対の側孔(11、12)が前記縫合糸(S)を挿通するように形成され、前記外筒(10)の先端側における内周面には前記外筒(10)の軸線方向に延びる係合部(13)が形成され、前記棒状体(20)の外周面には、前記係合部(13)に係合するとともに前記係合部(13)に沿ってスライドする被係合部(24)が形成されている。
