To solve a problem of a study desk combining a conventional desk with a self-standing bookcase, wherein the sufficient working space can not be secured on a top panel because the width of the top panel is restrained by the width of the bookcase.

The rear part 8 of the top panel 4 projects rearward from left and right leg panels 5 and 6. Left and right foot parts 14 and 15 include projections 16 and 16 projecting rearward from the left and right leg panels 5 and 6 respectively. The bottom panel 26 of a lower bookshelf 18 is raised by a fixed size from the floor surface by a pair of feet 29 and 29. An upper bookshelf 17 is mounted on the rear part 8 of the top panel 4, and the lower bookshelf 18 is disposed under the rear part 8 of the top panel 4. The projections 16 and 16 of the left and right leg panels 5 and 6 advance under the bottom panel 26.