To provide a self-standing screen which can easily be assembled and then such an once-assemble one can simply be disassembled into its original form again.

The self-standing screen comprises a body constituted by folding a piece of blank along its ruled line and an indicator panel. The screen includes a front panel, a shape retaining panel, a back panel and a support to allow self-standing by mountain-folding upper and lower ruled lines of the front panel, folding both the back panel and the support behind the front panel, and then inserting a spigot section protruded on the tip center of the support into a depressed notch formed at the back panel to be locked. The screen is characterized in that a spigot is connected with a hook through a hook ruled line, the depressed notch is formed in a position where all tips of the spigot can be inserted into a depressed section when forming a rectangular depressed section and folding the support under the back panel to be flat, and B+2D≤A<C is defined, where A=width of the depressed notch, B=width of the spigot, C=width of the hook, and D=paper thickness.