To provide a desktop shelf of a studying desk capable of maximizing the housing efficiency of books, notebooks, files and cases of CDs and DVDs by freely changing the attaching height of a book stand and a shelf plate corresponding to a housing form in the desktop shelf of the studying desk in which the book stand and the shelf plate can be rearranged.

In the desktop shelf 1, one or two housing bodies 5 and the shelf plate 6 are mounted inside an internal space formed of both side plates 3 and a back plate 4 so as to be detached and rearranged in a horizontal direction, and are mounted on the top plate rear part of the studying desk 2. On the back plate, two or three horizontally long slit holes 13 are lined at the same height position so as to detachably lock hooks 12 provided on the back surface of the housing body and change the attaching position of the housing body in the horizontal direction. The shelf plate can be mounted between the side plate and the housing body or between both housing bodies mounted at an interval.