Abstract: A foldable container, of which each of the two side walls has two sections to be foldable inwards so as to have the side walls folded on the floor of the container; the roof of the container is then fallen upon the side walls. Between the roof and the folded side walls, there is a space to accommodate the two end walls; consequently, the container can closely be folded up to facilitate an empty container to be handled in freight. The present invention discloses the fastenable hinges of the side walls and the connecting device of the end walls.