General der Flakartillerie (en: General of anti-aircraft artillery) was a General of the branch rank of the Luftwaffe (en: German Air Force) in Nazi Germany. Until the end of World War II in 1945, this particular general officer rank was on three-star level (OF-8), equivalent to a US Lieutenant general.
The "General of the branch" ranks of the Luftwaffe were in 1945:
Horst-Adalbert Koch: Flak - Die Geschichte der deutschen Flakartillerie und der Einsatz der Luftwaffenhelfer, 2. Auflage, Podzun Verlag, Bad Nauheim 1965