bending mechanism (81), vertical drive unit the drive shaft (83c) is disposed along the X-axis direction (83UD), a drive shaft (83c) is disposed along the X-axis direction the upper and lower drive unit in the Y-axis direction (83UD) and the left and right drive unit adjacent to the (83LR), up and down the rotation portion connected to rotate the upper and lower drive unit (83UD) and (85UD), connected to the left and right drive unit (83LR) rotation, has the upper and lower rotating part in the Y-axis direction (85UD) and the left and right rotating portion adjacent the (85LR). Bending mechanism (81), extends the operating wire (300UD) is on the side where the left and right rotation unit from the upper and lower rotating portion (85UD) (85LR) is disposed back surface (51d), the operation wire (300LR) left and right so as to cross to the back side further up and down the operation wire extends to (51d) (500UD) from the rotating portion (85LR) in the vertical rotating part (85UD) side, holding the the operation wire (300UD) and the operation wire (300LR) further comprises to that holding part (101).湾曲機構(81)は、駆動軸(83c)がX軸方向に沿って配設されている上下駆動部(83UD)と、駆動軸(83c)がX軸方向に沿って配設されY軸方向にて上下駆動部(83UD)と隣り合う左右駆動部(83LR)と、上下駆動部(83UD)と連結し回転する上下回転部(85UD)と、左右駆動部(83LR)と連結し回転し、Y軸方向にて上下回転部(85UD)と隣り合う左右回転部(85LR)とを有している。湾曲機構(81)は、操作ワイヤ(300UD)が上下回転部(85UD)から左右回転部(85LR)が配設されている側の裏面(51d)に延出して、操作ワイヤ(300LR)が左右回転部(85LR)から上下回転部(85UD)側における裏面(51d)に延出しさらに上下操作ワイヤ(500UD)に対して交差するように、操作ワイヤ(300UD)と操作ワイヤ(300LR)とを保持している保持部(101)をさらに有している。
