A foldable box includes a floor, two longitudinal-side and transverse-side exterior walls, and two lock elements having integrated rim areas. The longitudinal-side exterior walls extend a rim area at their free ends, respectively. The lock elements are arranged, at a free end of the transverse-side exterior walls, such that the integrated rim areas of the two lock elements of the transverse-side exterior walls and the two rim areas of the longitudinal-side exterior walls together form the rim of the foldable box in the folded-open state. The two lock elements of the transverse-side exterior walls are mounted to be moveable in relation to the transverse-side exterior walls to form a locking mechanism, wherein the two lock elements may be transferred from a respective locking state to a releasing state by a movement in a direction away from the floor.