Patent ID: 6936061

Claim:
A surgical operation instrument comprising: an elongate insertion section insertable into a body cavity and including distal and proximal end portions, the insertion section having an elongate axis; a first coupling member provided at the proximal end portion of the insertion section and being rotatable on a first pivot in a first direction; a handle provided for the first coupling member and rotatable on a second pivot in a second direction perpendicular to the first direction; a second coupling member provided for the handle; first and second driving rods having first ends and second ends, the first ends being connected to the second coupling member at positions sandwiching the first pivot; and a treatment section rotatably connected to the second ends of the first and second driving rods; said handle being rotatable from side to side and also being rotatable upward or downward with the first and second pivots as support points, said first and second driving rods moving in opposite directions along the elongate axis of the insertion section to rotate the treatment section from side to side when the handle is rotated from side to side about the first pivot, and moving in one direction along the elongate axis of the insertion section to rotate the treatment section up or down, when the handle is rotated up or down about the second pivot.