Abstract: The invention concerns a unit to create a space divider. This comprises a partial base to create the space divider and a lever arm attached to the partial base. Two of the units can be combined into a single combined base, on the same level, comprising two partial bases, the lever arms of the units being attachable to the partial base of the other unit using an attachment device created by the lever arm and the partial base themselves, and the two partial bases of the two units can be linked together by means of at least one of the following elements: interlocking forms, friction and traction. The invention also relates to a shelving system using a number of the units.