To provide a foldable container which has satisfactory molding stability and is configured so that a card or label pasted to a printing/labeling area is hardly removed.

The foldable container includes: long-side side plates and short-side side plates which are hinged respectively to four sides of a bottom plate having a rectangular shape in plan view; and support portions provided in a protruding manner along both the long sides of the bottom plates to place the lower ends of the long-side side plates thereon. Each of the support portion includes rib structures arranged on both sides and a double structure arranged between both the rib structures, in which the upper wall surface of the double structure is smaller in width than the upper wall surface of the rib structure so that the outer wall of the double structure is recessed to the inside of the container beyond the end surface of the rib structure. This outer wall surface of the double structure is used as the printing and labeling area.