The Fleet commander of the Kriegsmarine (Flottenchef) was the highest ranked administrative officer in the organization of the Kriegsmarine, and served as a member of the Oberkommando der Marine. The fleet commander did not actually serve as commander of an at-sea fleet, but instead was the senior officer to which the vessel type commanders reported. The position of fleet commander was created from an older position of the Reichsmarine known as Der Oberbefehlshaber der Seestreitkräfte.
In 1926, the position adopted the name Flottenchef, but was declared defunct one year later and left vacant with no assigned officer. The title became a position within the Kriegsmarine in 1936.