A suturing device is disclosed which sutures a tissue using a suture unit having a suture thread with both ends fitted to a first anchor and a second anchor, respectively. The suturing device includes a hollow tip member receiving the first and second anchors a wire having a front end inserted through the tip member so that the first and second anchors can be released out from the tip member a flexible tube having a distal end integrally connected at a proximal end of the tip member, through which the wire is inserted so as to freely move forward and backward in the axial direction of the tube a parallel member inserted through the tube so as to freely move forward and backward in the axial direction of the tube along with the wire a relative position holding member fitted to the wire so as to hold constant a relative positional relationship between the wire and the parallel member a forward movement restricting member provided on the tube or the tip member so as to restrict a forward movement of the parallel member and an operating portion provided at a proximal end side of the wire and the parallel member so as to operate the wire and the parallel member. In a state in which the relative positional relationship between the wire and the parallel member is held constant by the relative position holding member, when the wire is moved in the forward direction until the forward movement of the parallel member is restricted by the forward movement restricting member, only the first anchor is released out from the tip member by the movement of the wire.
