The invention relates to a ceiling support system for a movable component (7) of a diagnostic X-ray device (1). The system comprises a horizontally movable carriage (8), a crane (9) attached to the carriage (8), which crane (9) is vertically extensible and contractible by means of telescoping sections (10), and at least one flexible electrical cable (17) for the power supply and/or for the control of the movable component (7). In order to provide such a ceiling support system with improved movability of the X-ray tube and/or the X-ray image detector, the invention suggests that the electrical cable (17) is led from the carriage (8) through the telescoping sections (10) of the crane (9), wherein a cable drum (18) is arranged at the top end of the crane (9) for winding the electrical cable (17) during vertical movement of the component (7).