Abstract: A system for fixing accessories, such as shelf dividers, feed devices, holders for information carriers etc. to a shelf, to which self a number of accessories may be fixed detachably in various different positions along the length of the shelf. The system includes at least one accessory provided with a foot, and a clamping device, which includes a channel element, extending in parallel with the longitudinal direction of the shelf and presenting an open longitudinal side for forming an open channel, a actuable holding member, extending along the channel element for holding at least one foot in the channel and a control member for transferring the holding member between a holding position, in which the foot is held in a fixation position in the channel and a release position at which the foot is freed.