To easily assemble a strong desk alone by the small number of parts.

An end rail 9 is connected to a right side plate 8 by the engagement of small projections 27 and 28 for connection and connectors 40 and 41. A fixed side plate 10 is connected to the right side plate 8 and the end rail 9 by doweled joint, bolt tightening and the doweled joint at a horizontal bar 11 for supporting a fixed shelf plate provided on the front end part of the fixed shelf plate 10 in a downward projection shape. A left side plate 7 is connected to the end rail 9 and the fixed shelf plate 10 by the engagement of the small projections 27 and 28 for the connection and the connectors 40 and 41. A partition plate 12 is connected to the end rail 9 and the fixed shelf plate 10 by the doweled joint and wood screw tightening. A top plate 1 is connected to both left and right side plates 7 and 8 by the bolt tightening on both left and right drawer receiving side plates 21a and 21b provided on the lower surface.