Abstract: An arrangement for sealingly mounting a propeller shaft in a passage of the stern region of a watercraft hull includes a supporting sleeve, a separating sleeve closely surrounding the propeller shaft and received in the supporting sleeve coaxially therewith and with the propeller shaft, dynamic seals in the interface between the propeller shaft and the separating sleeve, sliding or rolling-type bearings in the space between the supporting sleeve and the separating sleeve, and a shaft-type seals at the respective ends of the space between the supporting sleeve and the separating sleeve. The separating sleeve separates the bearings from the dynamic seals so that a lubricant which lubricates the bearings cannot escape into the waters partially surrounding the arrangement passed the dynamic seals. The shaft-type seals prevent the lubricant from escaping into the water or into the interior of the watercraft hull.