are shown in fig1 according to an advantageous embodiment the drawing table may comprise additionally rolling up and down devices 28 and 30 located respectively at the upper and lower edges of the drawing board by means thereof it is possible to displace in accordance with the arrow a flexible and or transparent sheet 32 for example made from plastic material to which are fixed drawings plans symbols marks etc in drawing tables having a vertical rail such rolling up and down systems can only be positioned along the right hand and left hand edges of the table because the existence of a vertical rail supported on the board by means of a carriage at one end and a roller at the other prevent the vertical unrolling of a sheet the use of a telescopic arm in accordance with the present invention makes it possible to position these members along the upper and lower sides of the board this arrangement provides the drawing table with a considerable advantage because it permits the draughtsman to bring his working plane to the most convenient height and consequently he can work in the seated position fig2 illustrates in greater detail the articulation of the essential members comprising the table according to the invention these members are located either in the lower part of the board or in the upper part thereof this drawing shows the members mentioned with reference to fig1 and namely telescopic arm 8 supporting dividing head 4 and rules 6 carriage 10 moving along rail 12 maintained on board 2 by support 14 the winding up and down device 30 for sheet 32 and locking levers 22 and 26 this drawing also shows the rotation spindle 20 for the telescopic arm and the runners 24 of the carriage.