Abstract: An auxiliary drawer structure on top surface of a desk, it relates to the effective utilization of spaces for a desk, in particular, those spaces which are below the top face and by the rear side of a desk. Of which, the desk surface at the location said above is furnished with comparatively larger rectangular openings for receiving the longitudinally inserted box-shaped drawer, and the top surfaces of each lid on each of this box-shaped drawers are aligned flatly and evenly with the desk face after drawers are pressed into the rectangular openings. An extension/compression spring is furnished on bottom side of each drawer to serve self-rising purpose of each drawer, also guiding blocks and guided-swinging and positioning devices are furnished to both left and right-side respectively of each drawer for locking up when the drawer is risen up to a certain position or pressed down to its hide out position.