Provided is an intraoral cavity fixed type three-dimensional (3-D) oral cavity scanner (100) including: a housing (110) that can be located within an oral cavity of a patient a photographing unit (120) that is coupled to the housing (110) and photographs part of the patients teeth and a fixing portion (130) that is extended from the housing (110) and that is put in gear to the patient, so that the housing is fixed within the oral cavity, to thereby relieve the discomfort of the intraoral cavity fixed type 3-D oral cavity scanner that should be directly held by users hands and shifted from time to time.
