To omit an assembling work of mutual plane panels to form an L- shape in an assembling process by constituting an L-shaped panel unit having functions for the side face and back face, as a chief parts fabricated in advance in designing and fabricating processes.

Various kinds of L-shaped panel bodies 1, 2 are chief parts constituting the system together with various top plates 4, plane panels and wiring duct frames 6, legs, cabinets, shelf boards, etc. These parts are arbitrarily selected to construct a freely combinable L-shaped panel system partition for an office desk. The fabrication and assembling can be simplified by forming the panel body as a unified L-shape, and a more costless, safer, very widely combinable L-shaped panel system partition office desk can be fabricated. Further, as it is an L-shaped unified panel, connecting and tightening faces at corners are not required and hence it is neatly beautiful and the quality as an interior is improved.