Patent ID: 8128657

Claim:
A suture instrument comprising: a suture tool having an anchor for anchoring to a biological tissue, a suture thread which is drawn out of the anchor, and a stopper which is disposed on the suture thread; a hollow puncture needle having an opening at the distal end thereof, and able to house the anchor; a pusher disposed to advance and retreat in the puncture needle, a proximal end of the pusher extending to a proximal side in a state where the distal end thereof is in contact with the anchor; a pusher operating portion connected to the proximal end of the pusher; a spring member that is disposed at the pusher operating portion and that has a resilient restoring force which is set smaller than a frictional force generated over an entire length between the pusher and the puncture needle; a movable stopper which is connected to a one end of the spring member; and an outer sheath which houses the puncture needle so as to advance and retreat therein, wherein an engaging portion, that is disposed in the pusher, is detachably engaged with the suture thread, wherein the suture thread is drawn from the anchor, and wherein the anchor is housed in the puncture needle, the pusher moving relative to the puncture needle by a length of one anchor by moving the pusher operating portion toward the distal end, the spring member having a resilient force adjusted for corresponding the moving distance of the pusher to the length of one anchor when the spring member is compressed to a maximum; and the movable stopper advances relative to a branch portion while the spring member is restored to an original length after the spring member is compressed.