Abstract: A composite shelving system having two sidepieces and reactangular shelves arranged therebetween. Each sidepiece is built of two columns joined by connecting means, the shelves comprising protruding supporting means secured in apertures in the columns. The two sidepieces are braced by cross bars. Each column is constituted by a profiled bar having a long main slot for receiving the connecting means, and two small auxiliary slots for fixing the cross bars. The profiled bar has a substantially C-shaped cross section with flanges forming the main slot, the auxiliary slots being provided at the back of the "C". The connecting means are abutting sheet members with bent edge portions inserted into the main slot of the profiled bars.