A mounting equipment for mounting an object on a mount base component having a hollow portion of approximately circular cross section, which is less susceptible to damage and requires smaller number of parts, includes a expandable nut (3), a shaft portion (5) to be engaged with the object (13), and a nut (9) and a screw (11) for drawing the expandable nut (3) and shaft portion (5) close to each other. When the screw (11) is turned with the equipment inserted to the inside of the cylindrical component (7), the expandable nut (3) and the shaft portion (5) are drawn close to each other, and the shaft portion (5) is inserted to expandable nut (3) so that expandable nut (3) is expanded outward. Thus, part of the expandable nut (3) is brought into pressure contact with an inner wall of the cylinderical component (7), and hence object (13) is mounted onto the cylinderical component (7).