The purpose of the present invention is to provide a three-dimensional-measurement method and a three-dimensional-measurement device that prevent an increase in the amount of data and a processing load and that can obtain measurement results having good accuracy. Provided is a three-dimensional-measurement method for conducting three-dimensional measurement of a desired measurement range H in an oral cavity, the method including the following: displaying a re-measurement initialization position Rs at which initialized is re-measurement of a measurement information deficient location Lm, Ln detected by measurement information deficient location detection (step s6) for detecting the measurement information deficient location Lm, Ln which is included in measurement information obtained in a three-dimensional measurement step (step s5) for conducting three-dimensional measurement of the measurement range H and re-measuring an area which is from the re-measurement initialization position Rs and includes the measurement information deficient location Lm, Ln, causing a characteristic location in the measurement information of each of the re-measured re-measurement information and measured-in-advance measurement information to match, and thereby creating the three-dimensional measurement information of the measurement range H.La présente invention a pour objet de fournir un procédé de mesure tridimensionnelle et un dispositif de mesure tridimensionnelle qui empêchent une augmentation de la quantité de données et dune charge de traitement et qui peuvent obtenir des résultats de mesure présentant une bonne précision. Linvention concerne un procédé de mesure tridimensionnelle permettant deffectuer une mesure tridimensionnelle dune plage H de mesure souhaitée dans une cavité buccale, le procédé comprenant les opérations suivantes : afficher une position Rs dinitialisation de nouvelle mesure à laquelle est initialisée une nouvelle mesure dun emplacement Lm, Ln déficitaire en inf
