A wafer shipping container for storing a multiple number of backgrind-processed wafers in alignment, the wafer shipping container comprising a container body having stoppers formed on its inner sides and a cassette which is detachably placed in the container body, wherein the wafer shipping container further comprises a support device detachably fitted in the container body for constraining the flexure of the multiple number of backgrind-processed wafers when the wafers are stored in alignment in the wafer shipping container; said support device comprising: a pair of opposing walls which are positioned against an abutment side opposite to the open side of the container body; each opposing wall having a pair of fitting ribs projected from the outer side thereof, the paired fitting ribs being fitted to corresponding stoppers for the support device so that the support device is positioned and fixed in the container body, the upper part of each opposing wall being formed with a guide portion which is bent and gradually inclined outward as it goes upwards so as to come in contact with the bottom of the cassette, the wafer shipping container being characterized in that the support device further comprises: a pair of connecting bars across the spacing between the paired opposing walls; and a multiple number of partitioning supporters arranged with a predetermined pitch in the longitudinal direction of the connecting bars so that the wafers can being inserted and held between adjoining partitioning supporters, the partitioning supporters being projected equal to or greater than one third of the wafer diameter to receive and hold the wafers between adjoining partitioning supporters. a pair of opposing walls which are positioned against an abutment side opposite to the open side of the container body; each opposing wall having a pair of fitting ribs projected from the outer side thereof, the paired fitting ribs being fitted to corresponding stoppers for the support device so that the support device is positioned and fixed in the container body, the upper part of each opposing wall being formed with a guide portion which is bent and gradually inclined outward as it goes upwards so as to come in contact with the bottom of the cassette, the wafer shipping container being characterized in that the support device further comprises: each opposing wall having a pair of fitting ribs projected from the outer side thereof, the paired fitting ribs being fitted to corresponding stoppers for the support device so that the support device is positioned and fixed in the container body, the upper part of each opposing wall being formed with a guide portion which is bent and gradually inclined outward as it goes upwards so as to come in contact with the bottom of the cassette, the wafer shipping container being characterized in that the support device further comprises: a pair of connecting bars across the spacing between the paired opposing walls; and a multiple number of partitioning supporters arranged with a predetermined pitch in the longitudinal direction of the connecting bars so that the wafers can being inserted and held between adjoining partitioning supporters, the partitioning supporters being projected equal to or greater than one third of the wafer diameter to receive and hold the wafers between adjoining partitioning supporters.