Fabian Hambüchen (born 25 October 1987) is a German gymnast. He lives in Wetzlar.
Hambüchen was the youngest German athlete at the 2004 Summer Olympics in Athens and finished seventh in the horizontal bar and eighth in the team competition. So far in his career, he has won nine medals at World championships and eleven at European Championships. At the 2008 Summer Olympics in Beijing, he won the bronze medal in the horizontal bar.