The present invention provides a bending control device and a surgical instrument having the bending control device, and the bending control device includes a direction changing power input means A, a direction changing drive means B, a lock means C, and a linear power output means D, and is coaxial. The installed direction change power input means A and direction change drive means B have an angular range in which the direction change power input means A can rotate relatively in the circumferential direction. In the process of rotating relative to the direction changing drive means B from the angle at one end to the angle at the other end, the direction changing power input means A sequentially passes through the angle I, the angle range II, and the angle III as relative angles. I or angle III corresponds to the curvature, and angle range II corresponds to the locked state. ADVANTAGE OF THE INVENTION According to this invention, when performing a surgical operation, the problem regarding the curvature and fixation of a medical instrument inside a human body can be solved, and the risk of an operation can be reduced. [Selection] Figure 1本発明は湾曲制御装置及び湾曲制御装置を有する外科器具を提供し、湾曲制御装置は、方向変換動力入力手段Ａ、方向変換駆動手段Ｂ、ロック手段Ｃ、直線動力出力手段Ｄを含み、同軸に設置されている方向変換動力入力手段Ａと方向変換駆動手段Ｂとは、周方向において相対的に回転可能な角度範囲を有し、方向変換動力入力手段Ａが相対的に回転可能な角度範囲の一端の角度から他端の角度まで方向変換駆動手段Ｂに相対して回転する過程において、方向変換動力入力手段Ａは順次に相対角度として、角度Ｉ、角度範囲ＩＩ、角度ＩＩＩを通過し、角度Ｉまたは角度ＩＩＩは湾曲に対応し、角度範囲ＩＩはロック状態に対応する。本発明によれば、外科手術する際、人体内部において医療器具の湾曲と固定に関する問題を解決でき、手術のリスクを低減できる。【選択図】図１
