To provide an X-ray diagnostic device which can be installed in a relatively small space, and allows a subject to swiftly and safely come in and go out.

A subject keeping part 1 comprises a subject side keeping frames 3, 5 rotatably provided on a fixed part respectively through a subject side electric motors 2, 4. An X-ray emission side keeping part 10 comprises X-ray emission side keeping arms 13, 15, 17 rotatably provided on the fixed part respectively through X-ray emission side electric motors 12, 14, 16, and an X-ray tube 11 provided on the third X-ray emission side keeping arm 17. An X-ray detection side keeping part 40 comprises X-ray detection side keeping arms 43, 45, 47 rotatably provided on the fixed part respectively through X-ray detection side electric motors 42, 44, 46, and a flat-panel type X-ray detector 41 provided on the third X-ray detection side keeping arm 47. Each of the keeping parts 1, 10, 40 is independently and variably separated.

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