Christian Haass (born 19 December 1960 in Mannheim, Germany) is a German biochemist who specializes in metabolic biochemistry and neuroscience. Haass studied biology in Heidelberg from 1981 to 1985. From 1990 on he was a postdoctoral fellow in the laboratory of Dennis Selkoe at Harvard Medical School, where he worked from 1993 to 1995 as an assistant professor. Afterwards he returned to Germany as professor of molecular biology at the Central Institute of Mental Health, Mannheim. In 1999 he was offered a Chair in the medical faculty at the Ludwig Maximilian University of Munich.