To provide an integrally-molded transport container made of a synthetic resin which can be assembled and separated by a simple operation and fitted and stacked one on top of the other during recovery.

Side plates 3 are erected on the four sides of a flat, quadrangular bottom plate, and flanges 7 whose top faces are horizontal are projectingly formed on the edges of the upper ends of the pair of opposite side plates. The side plates are inclined out toward the face of an opening, and also stepped parts 5 are formed. The flanges are provided with hooks, through-holes for the hooks 9, positioning elastic strips, and positioning holes 11. The hooks, the through-holes for the hooks, the positioning elastic strips 10, and the positioning holes are formed diagonally symmetrically.