A device for the incremental positioning or height adjustment of an attachment or deflection point for a safety belt includes a guide bar, an adjustment element and a spring element. In accordance with the invention, it is intended to employ a leaf spring as the spring element, which extends over the length and width of the adjustment element and which is, together with the adjustment element, combined into a module clamped to the guide bar. The leaf spring assists in locking, supporting and guiding of the adjustment element.