An intubation assistance apparatus includes a main body； an insertion instrument having an elongated insertion section for insertion into a trachea or its vicinity of a patient from a mouth cavity of the patient； and an imaging device for acquiring an image of an observation site at a distal end portion of the insertion instrument as an electronic image. The intubation assistance apparatus is adapted to be used in an assembled state that the main body, the insertion instrument and the imaging means are assembled together. The main body includes a display having a rectangular screen for displaying the electronic image taken by the imaging device in the assembled state. The display is rotatably provided on the proximal end portion of the main body so as to be rotatable between a first position where the display is close to the main body and a second position where the display is far away from the main body, in which the center of the screen is located on the central axis of the insertion instrument regardless of the rotation angle of the display when the display is viewed from the side of the screen in the assembled state.
