To provide a small article housing box wherein a large opening can be formed without pulling out a drawer, and the drawer can be optionally removed.

A semi-arc shaped fulcrum-receiver, the upper surface of which is opened, is provided at the front section of the lower end of both side surface plates of an external box the front surface of which is opened. At the same time, an arc- shaped sliding rail for which the fulcrum-receiver is used as the center, is provided from an intermediate stage at the center of the side surface plates to a lower stage on the rear section. Then, at the final end of the sliding rail, a fastening protuberance is provided. In the meantime, for an internal box, the upper surface of which is opened, and which is inserted in the external box, a fulcrum protuberance being fitted in the fulcrum-receiver on the external box is provided at the front section of the lower end of the side surface plates of the internal box. At the same time, a guiding protuberance which slides on the sliding rail of the external box is provided at the rear section of the lower ends of the side surface plates. The fastening protuberance is provided at a location wherein the upper surface opening of the internal box may be totally exposed when the guiding protuberance is fastened. For the side surface plates of the internal box, the upper edges are cut off each into an arc-shape with the fulcrum protuberance as the center.