Self-Punching Functional Element

The present invention relates to a functional element that is configured for attachment to a workpiece, in particular to a sheet metal part, said functional element comprising a head part having a contact surface that contacts the workpiece in a fastened state of the functional element, A fastening section extends in an axial direction from the head part, in particular a rivet section, for fastening the functional element to the workpiece. The fastening section comprises a wall that bounds a hollow space in a peripheral direction and that has a free edge at a side facing away from the head par. The wall has opposing curved sections terminating at the free edge. The free edge lies along a peripheral curved line that has curved peaks and valleys which is endless and continuous. The peaks and valleys may be axially or radially extending, or both.