Disclosed is a foldable container (100), comprising a base (100), side plates (2,3) and a small door (31). The side plates are connected to the base (1). The small door (31) is arranged on the side plates. The small door (31) at least comprises a first part (312), wherein the width of the first part (312) gradually reduces from the upper end to the lower end, first meshing portions (315) are provided on the left end wall and the right wall of the first part (312), and first meshing structure (342) matching the first meshing portions (315) are provided on the side plates. When the container overall has a full load, the outward deformation of the small door is small when the small door is extruded by goods, thereby saving on conveyance or stacking space of the container, and the reliability of stacking and conveyance is improved.