A CT imaging apparatus comprising: an X-ray generator configured to emit an X-ray beam; an X-ray detector configured to detect said X-ray beam; a support that supports said X-ray generator and said X-ray detector while opposing said X-ray generator and said X-ray detector to each other; a rotation driving unit configured to rotate said support around a rotation axis line located between said X-ray generator and said X-ray detector; a display configured to display a panoramic tomographic image that is an image of a curved section (dm) corresponding to a dental arch of a subject; a first position setting unit configured to receive an input of a designation operation to designate a position in a mesiodistal direction on said panoramic tomographic image displayed on said display, and to set a first position on said curved section (dm) based on the designation operation; a fluoroscopic imaging executing unit configured to irradiate said subject with the X-ray beam along a fluoroscopic imaging direction having a component of a tangential direction at said first position on said curved section (dm) by controlling said X-ray generator, said X-ray detector, and said rotation driving unit, and to acquire a fluoroscopic image (SI1 to SI3); a second position setting unit configured to receive an input of a designation operation to designate a position in a buccolingual direction on said fluoroscopic image (SI1 to SI3) displayed on said display, and to set a second position based on the designation operation; an imaging region setting unit configured to set an imaging region of CT imaging based on said second position; and a CT imaging executing unit configured to irradiate said imaging region set by said imaging region setting unit with an X-ray cone beam by controlling said X-ray generator, said X-ray detector, and said rotation driving unit, and to execute said CT imaging. an X-ray generator configured to emit an X-ray beam; an X-ray detector configured to detect said X-ray beam; a support that supports said X-ray generator and said X-ray detector while opposing said X-ray generator and said X-ray detector to each other; a rotation driving unit configured to rotate said support around a rotation axis line located between said X-ray generator and said X-ray detector; a display configured to display a panoramic tomographic image that is an image of a curved section (dm) corresponding to a dental arch of a subject; a first position setting unit configured to receive an input of a designation operation to designate a position in a mesiodistal direction on said panoramic tomographic image displayed on said display, and to set a first position on said curved section (dm) based on the designation operation; a fluoroscopic imaging executing unit configured to irradiate said subject with the X-ray beam along a fluoroscopic imaging direction having a component of a tangential direction at said first position on said curved section (dm) by controlling said X-ray generator, said X-ray detector, and said rotation driving unit, and to acquire a fluoroscopic image (SI1 to SI3); a second position setting unit configured to receive an input of a designation operation to designate a position in a buccolingual direction on said fluoroscopic image (SI1 to SI3) displayed on said display, and to set a second position based on the designation operation; an imaging region setting unit configured to set an imaging region of CT imaging based on said second position; and a CT imaging executing unit configured to irradiate said imaging region set by said imaging region setting unit with an X-ray cone beam by controlling said X-ray generator, said X-ray detector, and said rotation driving unit, and to execute said CT imaging.