[Problem] To provide a medical instrument such that it is possible to effectively suppress the leading end thereof from springing back at the ending stage of incision, excision, or the like. [Solution] This medical instrument (1) comprises: operating members (14) for a practitioner to grasp elastic members (11) with intersecting leading ends, each elastic member (11) being attached to one end of a respective operating members (14) and opening and closing members (15) which are attached to the other ends of the operating members (14) and intersect at a pivot portion (13) thereof so as to be capable of opening and closing and which are provided with functional parts (15a) at the leading ends thereof for gripping, clamping, cutting, and the like. The functional parts (15a) are opened or closed by adjustment of the pressure applied to the operating members (14). The opening and closing members (15), the operating members (14), and the elastic members (11) are configured such that the relationship between the pressure applied on the operating members (14) and the amount of opening and closing of the functional parts (15a) has a linear proportional relationship from start to end of the action of the functional parts (15a).La présente invention vise à fournir un instrument médical tel, quil est possible defficacement empêcher le retour élastique de son extrémité avant à la fin dune incision, dune excision, ou équivalents. La présente invention concerne par conséquent un instrument médical (1) qui comprend : des éléments opérationnels (14) destinés à être saisis par un praticien des éléments élastiques (11) avec des extrémités avant se croisant, chaque élément élastique (11) étant fixé à une extrémité dun élément fonctionnel respectif (14) et des éléments douverture et de fermeture (15) qui sont fixés aux autres extrémités des éléments opérationnels (14) et se croisent au niveau dune partie de pivot (13) de ceux-ci, étant ainsi capables douverture et de fermeture et étant
