A fixing device for inserting a tube in the respiratory tract which is disclosed is for enabling a tube insertion in the respiratory tract of a rodent, and comprises: a holding plate on which the rodent is held a support member, which is installed at an upper end portion of the holding plate so as to be horizontally movable, for supporting a gas supply tube for supplying anesthetic gas to the nose of the rodent and a coupling member for fixedly coupling the support member to the upper end portion while an end portion of the gas supply tube is aligned with the nose of the rodent.Linvention concerne un dispositif de fixation pour lintroduction dun tube dans le tractus respiratoire, qui permet lintroduction dun tube dans le tractus respiratoire dun rongeur et qui comprend : une plaque de retenue sur laquelle est maintenu le rongeur un élément de support, qui est monté sur une partie extrémité supérieure de la plaque de retenue de façon à être déplaçable horizontalement, pour tenir un tube dalimentation en gaz pour fournir un gaz anesthésique au nez du rongeur et un élément daccouplement pour accoupler de façon fixe lélément de support à la partie extrémité supérieure, tandis quune partie dextrémité du tube dalimentation en gaz est alignée avec le nez du rongeur.개시된 기도내 삽관용 고정 장치는, 설치류의 기도내 삽관 작업을 위한 고정장치로서, 설치류가 거치되는 거치대와, 거치대의 상단부에 횡방향으로 이동될 수 있게 설치되며 설치류의 코에 마취 가스 공급을 위한 가스 공급관을 지지하는 지지부재와, 가스 공급관의 단부가 설치류의 코와 정렬된 상태에서 지지부재를 상단부에 결합시켜 고정시키는 결합부재를 포함한다.