Abstract: Shelf systems consist of shelf panels, post elements and connecting elements to retain the shelf panels at the post elements, and they are provided to offer to the user a maximum of freedom in the design of an individualized shelf. The invention presents a shelf system wherein the connecting elements include a joint having one degree of freedom and being adapted to be secured in a way that each shelf panel may be fixed in a horizontal position at least two post elements and may be prevented from tilting. In this way it becomes possible to design the post elements such that they extend at an angle relative to the horizontal or that they may also be arched, e.g. for adaptation of the tilt in a room.