The whole arrangement of teeth can be imaged at a time without performing segmented imaging for each region in an oral cavity. Imaging devices having a wide angle lens of wide angle of field and capable of closeup imaging are installed. When imaging the tooth arrangement buccal side, the light input section of each imaging device is directed with a given distance toward the tooth buccal surface perpendicularly to the tangent of a buccal-side tooth arrangement arch form outline form similar figure virtual curve. When imaging the tongue side, the light input section is directed toward the tooth tongue side perpendicularly to the tangent of the tooth arrangement arch form outline form similar figure virtual curve. When imaging the occlusal surface, the light input section is directed toward the tooth occlusal surface on the tooth arrangement virtual arch form. The image information of the imaging devices is integrated, a panoramic two-dimensional image, a tooth arrangement three-dimensional image, or a panoramic movie image is displayed, and CAD data on the tooth arrangement form acquired from the tooth arrangement three-dimensional measurement coordinate data is outputted.
