Abstract: An attachment element is made up of a middle part and two lateral movable parts linked to this middle part. In the middle part, a slot-like recess is provided in order to receive a belt, strap or loop. Using the lateral parts it is then possible for the attachment element to be connected with the flat piece of material. In this respect the middle part is arranged parallel to the edge of the flat piece of material, whereas the two lateral parts fit respectively around the flat piece of material, such as sheeting laying on opposite sides of the flat piece of material. The attachment element is able to be attached adjacent to the flat piece of material in different ways.