Fritz Schlieper[1] (4 August 1892 – 4 June 1977) was a Nazi German military officer who served during World War I and World War II, eventually gaining the rank of Generalleutnant.

After the First World War, Schlieper continued to serve in the Weimar Republic's Reichswehr and when the Weimar Republic was replaced by Nazi Germany, he remained in the Heer component of the Wehrmacht and from 1935 to 1939 commanded the 17th Artillery Regiment.

During Operation Barbarossa, he commanded the 45th Infantry Division in one of the initial battles, the Defense of Brest Fortress.

In 1942, he was transferred to Slovakia to lead Nazi German military mission at Slovakian Ministry of Defence.

He was released from his position after conflict with Minister General Ferdinand Čatloš.