In order to smoothly perform both opening/closing operations of gripping members and transfer operations of a suture needle, this suturing device is provided with a long shaft member, a pair of gripping members (11, 12), and a transfer mechanism (15) for transferring a suture needle (3) between the gripping members (11, 12). The transfer mechanism (15) is provided with: fitting holes (11a, 12a) which are provided in each gripping member (11, 12) and into which the suture needle 3 is fitted gripping members (16, 17) which, by being pulled towards the base end in a direction crossing the axis of the fitting holes (11a, 12a), are inserted into recessed portions (3c) on the outer peripheral surface of the suture needle (3) a swinging member (24) which is provided swingably about an axis perpendicular to the longitudinal axis a pair of tension transmitting members (19a, 19b) which transmit tension for swinging the swinging member (24) axial force transmission members (18a, 18b) which transmit the axial force that accompanies swinging of the swinging member (24) and a gripping state maintaining mechanism which maintains the gripping members (16, 17) in the recessed portion (3c).Linvention a pour objet deffectuer facilement un mouvement douverture/fermeture déléments préhension et un mouvement de distribution daiguilles de suture. Linstrument pour suture de linvention est équipé dun élément axe long, dune paire déléments préhension (11, 12), et dun mécanisme de distribution (15) distribuant les aiguilles de suture (3) entre les éléments préhension (11, 12). Le mécanisme de distribution (15) est équipé : de parties orifice dengagement (11a, 12a) agencées sur chacun des éléments préhension (11, 12), et induisant lengagement des aiguilles de suture (3) déléments de soutien (16, 17) qui sont attirés dun côté extrémité de base suivant une direction croisant la ligne axiale de chaque parties orifice dengagement (11a, 12a), et qui sont insérés à lintérieur dune partie retrait (3
