PROBLEM TO BE SOLVED: To provide a suturing device capable of easily and reliably forming a seam or a knot by a mechanical action that is based on a simplified operation.SOLUTION: The suturing device includes: a long cylindrical member 12； a long needle 30 which holds a first string-shaped member L1 and is arranged inside the cylindrical member 12 so as to be reciprocally movable in a longitudinal direction of the cylindrical member 12 and exposable from a side surface of the cylindrical member 12, and with which is formed a loop of the first string-shaped member L1； a recess 34 which is formed along a side surface of the cylindrical member 12 to expose the needle 30, and which has an inner wall surface having a shortest distance between a moving locus K of the tip of the needle 30 and the inner surface continuously changing in the movement direction of the needle 30； and a shuttle 26 which has a holding part 62 holding a second string-shaped member L2, and which passes the second string-shaped member L2 held by the holding part 62 through the loop LP formed on the needle 30, by movement inside the cylindrical member 12 at a more advanced position of the moving locus K of the tip of the needle 30 than the recess 34 inside the cylindrical member 12 in the longitudinal direction of the cylindrical member 12.SELECTED DRAWING: Figure 38【課題】単純な操作に基づく機械的な動作により、簡単かつ確実に縫い目或いは結び目を形成することができる縫合装置を提供する。【解決手段】長手状の円筒部材１２と、第１の糸状部材Ｌ１を保持し、円筒部材１２の長手方向に往復移動可能に且つ円筒部材１２の側面から露出可能に円筒部材１２内に設けられ、第１の糸状部材Ｌ１のループが形成される長手状の針３０と、円筒部材１２の側面に形成されて針３０を露出させるとともに、針３０の先端の移動軌跡Ｋとの間の最短距離が針３０の移動方向において連続的に変化する内壁面を有する窪み３４と、第２の糸状部材Ｌ２を保持する保持部６２を有し、円筒部材１２の長手方向の円筒部材１２内の窪み３４よりも針３０の先端の移動軌跡Ｋの前進端側位置において、円筒部材１２内を移動することにより保持部６２に保持された第２の糸状部材Ｌ２を針３０に形成されたループＬＰに通すシャトル２６とを、含む。【選択図】図３８
