Rudolf Stahlecker (25 November 1898 in Sternenfels near Pforzheim – 26 October 1977 in Urach) was a German geologist and biology teacher.

He studied with the German paleontologist Friedrich von Huene at the University of Tübingen, Germany.

After finishing his doctorate, Stahlecker did not become a scientist but a biology teacher at a school in Stuttgart.

His motto was, "the Führer wanted to teach people to think again biologically; we scientists have to be here as its first collaborators".

After World War 2, he had to pause for some years during de-Nazification, thought he was not as intensely involved in the Nazi Party as his brother, Walter Stahlecker.