A suture instrument (101, 131, 151) adapted to be inserted into a body and to eject elongated anchors (27, 141) to which a suture thread is connected, comprising: a base (13, 102, 152) that extends from a proximal end on a hand side to a remote end that is introduced to tissue, the base (13, 102, 152) being capable of being inserted into a perforation and having flexibility; an anchor holding instrument (112, 139, 155) that is capable of housing a plurality of the anchors (27, 141) inside, wherein the anchor holding instrument (112, 139, 155) is disposed and housed in the remote end of the base (13, 102, 152) along an axis of the base (13, 102, 152) such that the distal end of the anchor holding instrument (112, 139, 155) is approximately pointed in a direction of a proximal end of the base (13, 102, 152); a tip position changing mechanism (103, 140) adapted to move the distal end of the anchor holding instrument (112, 139, 155) in a radial direction intersecting the axial line of the base (13, 102, 152) from a position where the anchor holding instrument (112, 139, 155) is housed in the base (13, 102, 152) to a position where the distal end of the anchor holding instrument (112, 139, 155) is apart from a distal end of the base (13, 102, 152) and is approximately pointed in the direction of the proximal end of the base (13, 102, 152); and a position operation device (17, 121, 145, 190) that operates the tip position changing mechanism (103, 140) at the hand side and operates a position of the distal end of the anchor holding instrument (112, 139, 155), characterized in that a distal end of the anchor holding instrument (112, 139, 155) is adapted to be inserted into the tissue and to eject the anchors (27, 141). a base (13, 102, 152) that extends from a proximal end on a hand side to a remote end that is introduced to tissue, the base (13, 102, 152) being capable of being inserted into a perforation and having flexibility; an anchor holding instrument (112, 139, 155) that is capable of housing a plurality of the anchors (27, 141) inside, wherein the anchor holding instrument (112, 139, 155) is disposed and housed in the remote end of the base (13, 102, 152) along an axis of the base (13, 102, 152) such that the distal end of the anchor holding instrument (112, 139, 155) is approximately pointed in a direction of a proximal end of the base (13, 102, 152); a tip position changing mechanism (103, 140) adapted to move the distal end of the anchor holding instrument (112, 139, 155) in a radial direction intersecting the axial line of the base (13, 102, 152) from a position where the anchor holding instrument (112, 139, 155) is housed in the base (13, 102, 152) to a position where the distal end of the anchor holding instrument (112, 139, 155) is apart from a distal end of the base (13, 102, 152) and is approximately pointed in the direction of the proximal end of the base (13, 102, 152); and a position operation device (17, 121, 145, 190) that operates the tip position changing mechanism (103, 140) at the hand side and operates a position of the distal end of the anchor holding instrument (112, 139, 155), characterized in that a distal end of the anchor holding instrument (112, 139, 155) is adapted to be inserted into the tissue and to eject the anchors (27, 141).