The hanging device includes a plug-in sleeve (1), which is held in a through-hole (502) in a supporting structure (5), and a supporting arm (2) which can be inserted into the plug-in sleeve. The plug-in sleeve (1) has a sleeve piece with a front inlet into a channel, a first arresting contour (1150) which borders the channel, and a flange (10) which extends from the sleeve piece. The supporting arm (2) is fitted with a plug-in section (21) and has a first mating contour (23) which interacts with the first arresting contour (1150). A front end (22) is situated opposite the plug-in section (21). The first arresting contour (1150) is situated at a distance from the inlet into the channel. The first mating contour (23) on the plug-in section (21) is situated on the upper face with an offset in relation to the plug-in end (20).