shtabs-kapitan

thumb|Staff captain, Russian artillery, wearing a [[Pickelhaube, about 1858]] Stabskapitän (English: staff captain), in the cavalry also Stabsrittmeister ("staff riding master" or "staff cavalry master"), or Kapitänleutnant (captain lieutenant), was a historic military rank in the Prussian Army. In reference to the German Stabskapitän the equivalent rank in the Imperial Russian Army used to be the rank shtabs-kapitan ().

It ranked between the Premierleutnant (later called Oberleutnant) and Hauptmann/Rittmeister in the Prussian army, and between poruchik and captain in the Russian army. Its holder represented the actual captain and company commander in his absence, frequently and often for long periods, should his (usually noble) Hauptmann show no interest in leading the company, though the Hauptmann would retain his rank, status and uniform.