Patent ID: 8231640

Claim:
A suture instrument comprising: therapeutic insertion section comprising a suture section formed on a distal end thereof and the suture section configured to suture a tissue endoscopically; a cylindrical main operation unit connected to a proximal end of the therapeutic insertion section; a rod section inserted into the main operation unit along an axial line of the main operation unit from a proximal end of the main operation unit; a pusher's distal end section for pressing a suture thread and end section members to move, the end section members being connected to at least an end of the suture thread; a guide mechanism comprising a cylindrical member disposed to the proximal end of the therapeutic insertion section and connected to a suture section via a connection member; and an engagement member fixed to a distal end of the rod section and inserted into the cylindrical member; a distal engagement section projecting distally in an axial direction and inward in the radial direction from an outer periphery of a distal end of the engagement member; an advance-and-retraction movement section comprising an abutment section and a mating engagement section, the advance-and-retraction movement section being positioned and configured to advance freely from and to retract freely into the cylindrical member, the abutment section making contact with a distal end of the distal engagement section, and the mating engagement section engaging with the distal engagement section when the rod section is rotated relative to the cylindrical member in the circumferential direction; a first pressing member pressing the pusher's distal end section to move corresponding to the operations conducted by the rod section; and a second pressing member pressing the pusher's distal end section to move independently from the first pressing member corresponding to a movement of the advance-and-retraction movement section, wherein the second pressing member presses the pusher's distal end section to move when the distal end of the distal engagement section makes contact with the abutment section, and the first pressing member presses the pusher's distal end section to move when the distal engagement section engages with the mating engagement section.