The present invention relates to an X-ray photographing apparatus and method capable of variously and finely adjusting a magnification power by sliding a rotating portion supporting an X-ray source portion and a sensor portion facing each other in a state in which an interval between the X-ray source portion and the sensor portion is maintained to change an interval between the sensor portion and a head of a subject to be examined. The X-ray photographing apparatus includes: a rotating portion including an X-ray source portion and a sensor portion facing each other and provided at a shaft through a moving means so as to be movable in an X-ray irradiation direction； and an actuating portion adjusting a magnification power by changing an interval between the sensor portion and a head of a subject to be examined in a state in which an interval between the X-ray source portion and the sensor portion is maintained.
