The invention concerns agriculture. It concerns in particular a working trolley especially for installing roof window panes of agricultural greenhouses, characterised in that it comprises a framework 1 equipped with driven wheels 2, 3 for its movement along the ground and means 4 for controlling the separate driving of each wheel, a working platform 5 mounted on the said framework 1 by a lifting device 6 to 18 equipped with control means 13, 14, 15 for ensuring lifting and lowering of the said working platform 5, a vertical elevator device 20, 21, 22 arranged in the vicinity of the front end of the said platform 5 and which is fixed to the said framework, the lifting element 22 of the said elevator device being able to receive in a fixed or detachable fashion, a chest 23 intended to receive the glass panels 24 to be installed. The invention applies particularly to fitting roof window panes of agricultural greenhouses. <IMAGE>
