Rotating positive electrode x-ray tube unit and rotating positive electrode x-ray tube device

A rotating positive electrode X-ray tube unit (5) is provided with a rotating positive electrode X-ray tube (30) and a flow-path-forming body. The rotating positive electrode X-ray tube (30) has a negative electrode, a positive electrode target, and a vacuum enclosure (31). The flow-path-forming body has a shell surrounding the vacuum enclosure (31) in the direction perpendicular to the axial line of the positive electrode target, and forms a channel (CC) for channeling a cooling medium between the flow-path-forming body and the vacuum enclosure. The rotating positive electrode X-ray tube unit (5) is also provided with an X-ray shielding means for preventing X-ray leakage.