PROBLEM TO BE SOLVED: To provide a medical suture instrument wherein workability and operability is drastically improved.SOLUTION: This suture instrument 100 transmits movement of an operation part 10 to a loop formation part 80 and a suture 1 with a time difference by a loop feeding/returning mechanism 30 and a suture feeding mechanism 40, and feeds out the suture 1 from the tip of a suture-introducing needle 70 after a loop 82 is fed out from the tip of a loop-introducing needle 60.
