Leutnant Hermann Pfeiffer (24 July 1890 – 20 May 1917) IC was a German World War I flying ace credited with eleven aerial victories.
Once qualified, he was posted to Feldflieger Abteilung 110, where he was promoted to Vizefeldwebel on 11 July 1916.
Later that month, he transferred to Feldflieger Abteilung 10, to fly single-seated Fokker fighters.
[1] Pfeiffer continued to shoot down enemy planes, tallying seven more between 10 November 1916 and 14 May 1917.
[1] On 20 May 1917, Hermann Pfeiffer died during the test flight of a captured Nieuport fighter.