A coupling element includes at least one coupling member having a first end and a second end, wherein the coupling member has a flat face on a first side thereof, at least one barb extending in cantilever manner from the flat face and depending away from the first end so as to hinder or prevent the removal of the coupling element from a bore in a surface of a first article into which the coupling member has been inserted from the first end.

A connecting device for connecting a first component and a second component, comprising: a first connecting element arranged on the first component in the connected state of the components; and/or a second connecting element arranged on the second component in the connected state of the components, wherein the first connecting element comprises a first housing and a holding element, which is movable relative to the first housing of the first connecting element, for releasably connecting the first connecting element to the second connecting element and/or to the second component, wherein the movable holding element comprises a first holding contour, wherein the second connecting element and/or the second component comprises a second holding contour behind which the first holding contour is able to engage, wherein at least one of the connecting elements comprises, on the respective housing, a curved face, which is in the form of a circular arc in longitudinal section.

A coupling element includes at least one coupling member having a first end and a second end, wherein the coupling member has a flat face on a first side thereof, at least one barb extending in cantilever manner from the flat face and depending away from the first end so as to hinder or prevent the removal of the coupling element from a bore in a surface of a first article into which the coupling member has been inserted from the first end.