To provide a simple folding storage tool capable of folding when it is not required and capable of facilitating flexible storage when it is required.

Two openable and closable panel bodies (1), (2) are structured with a rotary shaft part (4) and a flexible net (3) is attached to a surface which is a front surface in an opened state so that a corner enclosing body is formed while the panel bodies are opened. An object to be stored can be secured in the corner enclosing body by arranging an upper cover part (5) over an upper part of the corner enclosing body and fastening it with fastening tools (7).