PROBLEM TO BE SOLVED: To provide a suture knot-tying member capable of easily and efficiently knotting an end side of suture in the suturation of a biological tissue in an operation, and a suture set.SOLUTION: A suture knot-tying member 5 for knotting a suture used for suturation of a biological tissue at an end side includes: a first wall part 52A a second wall part 52B which is connected to the first wall part 52A and at least a part of which faces the first wall part 52A and a knot-tying part 54 that is formed between the first wall part 52A and the second wall part 52B. The knot-tying part 54 is so configured that at least one of the first wall part 52A and the second wall part 52B is deformed by being pressed by the suture to which tensile force applied, to house the end side of the suture between the first wall part 52A and the second wall part 52B.COPYRIGHT: (C)2015,JPO&INPIT【課題】手術における生体組織の縫合において、縫合終了端側の糸留めを、容易かつ効率的に行うことが可能な縫合糸係止部材及び縫合針セットを提供すること。【解決手段】生体組織の縫合に用いた縫合糸を、終了端側において糸留めする縫合糸係止部材5であって、第1壁部52Aと、前記第1壁部52Aと接続されて、少なくとも一部が前記第1壁部52Aと対向する第2壁部52Bと、前記第1壁部52Aと前記第2壁部52Bの間に形成される係止部54とを備え、前記係止部54は、引張力が作用した状態の縫合糸に押圧されて前記第1壁部52Aと前記第2壁部52Bの少なくともいずれか一方が変形することにより、前記第1壁部52Aと前記第2壁部52Bの間に前記縫合糸の終了端側が収容されるように構成されていることを特徴とする。【選択図】図6