Disclosed is a dental X-ray imaging apparatus having an imaging unit housing so as to provide a stable imaging environment to an examinee. The dental X-ray imaging apparatus, according to the present invention, comprises: an imaging unit including a rotary arm rotating with respect to a rotary shaft, and an X-ray generator and an X-ray sensor, which are arranged to face each other at both sides of the rotary arm with a subject disposed therebetween； and the imaging unit housing for surrounding the upper part, outside and inside of an operating range of the imaging unit. In addition, in order to reduce the volume of the imaging unit housing, the dental X-ray imaging apparatus, according to one aspect of the present invention, comprises: the rotary arm rotating with respect to the rotary shaft； a sensor unit disposed at one side of the rotary arm, and provided with the X-ray sensor disposed to have an inclination at a predetermined angle with respect to the rotary shaft； and the X-ray generator disposed at the other side of the rotary arm to face the X-ray sensor with the subject disposed therebetween, and irradiating the X-ray sensor with an X-ray beam.
