Abstract: A clamping device for panel elements (3) portable along a top and bottom guide rail (1, 2), the elements being fitted with a guide (4, 5) mounted on the top and bottom edge of an element, the guide rails (1, 2) being provided with a pivoting point for the element (3), at which the element (3) is pivotable relative to a pivot spindle (6) constituted by a guide (4) on the top edge of the element and a guide (5) on the bottom edge of the element, at least one of the guides (4, 5), which constitute the pivot spindle (6), being adapted to set in a clamped position in the guide rail (1, 2) as the element (3) is pivoted relative to said pivot spindle (6). The guide (4) is adapted to clamp in place includes a locking member (7) with a circular-segment shapped cross section, adapted to be non-rotatable relative to the element (3) and having a straight portion (8) which is aligned essentially in parallel with the guide rails (1, 2) as the element (3) travels along the guide rails.