To succeedingly perform photographing by accurately reporting the occurrence of wire disconnection to an operator in the occurrence of the wire disconnection while smoothly locking the up and down movements of an X-ray tube device and performing the possible operation of the X-ray tube device even after the occurrence of the wire disconnection while confirming necessary data.

When the wire disconnection occurs during the manual operation of the X-ray tube device 6, the display of data necessary for photographing in a display device is changed over to the display of warning but, when the operation is related to the up and down movements of the X-ray tube device, the up and down movements of the X-ray tube device is not locked until the operation is completed. Meanwhile, when the operation is unrelated to the up and down movements of the X-ray tube device, the up and down movements is locked simultaneously with the display of the warning. When photographing is possible only by operation other than the up and down movements of the X-ray tube device even after the occurrence of the wire disconnection, the display of the warning in the display device is changed over to the display of the data necessary for photographing during the manual operation of the X-ray tube device.

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