FOLDING BOX

PROBLEM TO BE SOLVED: To provide a folding box of which the structure is simple, of which the number of parts is less, and which can be easily folded/built-up/developed, and becomes a strong structure under a solid built up state. SOLUTION: This folding box is equipped with rectangular frame shaped edge frames 3 and 4, a first penal body 1, and a second panel body 2. In this case, the first panel body 1 comprises two side plates and a bottom plate. Then, respective one-side ends of the two side plates are attached to confronted two edges of the edge frames, and can be folded into a V-shape or developed by a hinge formed in parallel with two pieces, of the edge frame at an intermediate section of the side plates. The bottom plate is integrated in a manner to be folded/developed with a hinge with the bottom ends of the two side plates. The second panel body 1 comprises two side plates and a bottom plate. Then, respective one-side ends of the two side plates are attached to another confronted two edges of the edge frames. The bottom plate is connected with the bottom ends of the side plates by a hinge in a manner to be foldable/developable. Also, the bottom plate itself can be folded/developed by a hinge which is formed at the center. In addition, the height dimension of the side plates is formed to be approximate one half of the length dimension of the bottom plate.