Abstract: A holder for retaining an endotracheal tube in a patient's mouth has upper and lower portions, each including a semi-cylindrical member with wings extending radially on opposite sides. The upper and lower portions are joined by a flexible hinge between a first wing of the upper portion and an opposed first wing of the lower portion. When the hinge is closed, a region of each upper wing is adjacent to a region of a corresponding opposed lower wing, and the semi-cylindrical members form a sleeve defining a lumen sized to receive the endotracheal tube. A safety clamp limits the extent to which the upper and lower portions can pivot apart about the hinge to a predetermined maximum angle, whereby the position of the endotracheal tube can be adjusted axially, but radial displacement of the tube from the holder is restricted.