To make it possible to rotatably and easily attachably and detachably hold a ball by supporting a C-shaped bracket of a rotary display mechanism for exhibiting a sporting ball, etc., on a pedestal via a supporting member and supporting the ball by means of adjusting member disposed at both ends of the bracket.

The central part of the pedestal 12 which can be installed on a horizontal plane is provided with the upwardly perpendicularly extending supporting rod 14 and the intermediate part of the bracket 16 curved to a C shape is mounted at this supporting rod 14. At this time, the bracket 16 is mounted by inclining its two free ends 18 and 20 so as to be offset from the axis, i.e., perpendicular axis of the supporting rod 14 and the opening part of the bracket 16 is set as such a size at which the sporting ball B can be received and that at least half part of the ball can be covered. The ball B is held between both poles by the adjusting members 22 and 22 mounted at both free ends 18 and 20 of the bracket 16, by which the ball B is freely attachably and detachably held.