An X-ray CT apparatus (20) includes an X-ray generator (40), an X-ray detector (45), a support part (30), and a base (100) that rotatably supports the support part (30). The support part (30) includes an exterior part (32) made of carbon fiber reinforced plastic, and the X-ray generator (40) and the X-ray detector (45) are supported by the exterior part (32) while being opposed to each other. The base (100) rotatably supports the support part (30) such that the X-ray generator (40) and the X-ray detector (45) turn about a turning axis (A).
