Abstract: To stabilize the inserted position of an endotracheal tube and to protect it against bite-damage, a bite-block of relatively rigid tough plastic has integrally connected front-edge flanges for overlying the upper and the lower lips of a patient for attachment thereto as by strips of adhesive tape, and has a forwardly extending vertically-on-edge flange for attachment thereto of the endotracheal tube as by adhesive tape wrapped therearound.