A scanner for the oral cavity is disclosed. The scanner for the oral cavity according to an embodiment of the present invention comprises: a light outputting unit to which a laser light source is irradiated; a phase changing unit changing the outputted light outputted from the light outputting unit into different phases for different periods of time; a phase detecting unit detecting position or state information according to the movement of the phase changing unit; a first reflecting unit disposed to face the light outputting unit and refracting the light irradiated from the light outputting unit; a second reflecting unit disposed to face the first reflecting unit and reflecting the light reflected through the first reflecting unit toward an object to be measured disposed in the mouth of a patient; an image information obtaining unit disposed at the rear of the first reflecting unit and converting the reflected light inputted and reflected from the object to be measured into two-dimensional image information; and an acceleration sensing unit sensing the change in acceleration while obtaining data about the object to be measured.
