Abstract: This piece of furniture is designed for setup at the work place in a modular design concept and has an adjustable tabletop. At the rear edge of the tabletop (1) there is at least one bolt (27) with a projecting end which passes through a vertical slit (29) in a hollow beam (3). In the hollow space of this beam, there is at least one vertical adjusting spindle (32) which has a follower nut (31). This follower nut is connected to the bolt (27) in such a way that when the spindle is turned, the rear part is raised or lowered. The adjusting mechanism is easy to operate and permits infinite adjustment of the rear side of the tabletop. It takes up very little space, so that electrical lines and other facilities can be housed easily in the hollow space of the beam.