Folded or concertina wall, with an attachment element between two folds or waves

Folding bellows comprises a holding element (20) with an expansion (21) on the end facing an edging frame (25). The expansion protrudes into the eye (25a) of the frame. Preferred Features: The holding element has pairs of holes in the region of the edging frame. One bore pair receives the legs of a binding clip to join the holding element to the bellows material. The holding element is rounded on its end facing the edging frame.