To provide a device which is can be used with ease and eliminates the troublesomeness someness by eliminating the drawbacks of the lack of adhesion property and consequently lack in stability, when a bulletin object is posted on a flat planer body.

A disk body (1a) is provided with a male type projecting part (3a) at its center. A portion at the end of the circumference of the disk body (1a) is provided with a hole (6a). A disk body (2a), integrated with a suction tray (5a), is provided with a female type hole (4a) at its center and the end of the external form of the suction tray (5a) is provided with a suction remover of a hole 7(a). The disk body (1a) and the disk body (2a) are united by putting the bulletin object (X) between both and the flat planner body (Y) is attracted thereto.