Abstract: To save space in an office when a personal computer is operated or when a conference is held with a number of persons, a working table which has a concave portion at the front edge and a auxiliary table are used. A plurality of the working tables and auxiliary tables are arranged side by side and surrounded by a partition to form a working room. The auxiliary table is placed by the working table and is movable with casters at the ends of feet of the auxiliary table. The height of the auxiliary table is variable, so that it is disposed with the working table at the same height for conference in the office, or is stored under the working table when the auxiliary table is not used. On a board which is slidably mounted on a panel at the rear end of the table, information or schedule may be written. The working room surrounded by the partition has a roll screen, and the workers can discuss various matters, watching an image on the roll screen projected by a projector.