Stefan Schumacher (born 21 July 1981) is a German professional road racing cyclist. Schumacher won the bronze medal in the 2007 Road Race World Championship, two stages in the 2006 Giro d'Italia and two stages in the 2008 Tour de France. After positive results on doping products in the 2008 Tour de France and the 2008 Summer Olympics, he received a suspension for two years, later reduced by some months. After his suspension, he came back as a professional cyclist.

First professionally employed with Team Telekom in 2002, he was released the following year. In 2006, he made his UCI ProTour debut with Team Gerolsteiner after posting impressive continental circuits results on the UCI Europe Tour.

Schumacher has been involved in a series of controversial incidents during his career. He was implicated in a doping case in 2005 when he tested positive for an amphetamine. His mother, a doctor, had prescribed an asthma medication after failing to find it on the World Anti-Doping Agency's list of banned substances, and checking with the appropriate Dutch agency. He was cleared by the German cycling federation of a doping offence.

In 2006 Schumacher, now riding for Gerolsteiner, won the Eneco Tour of Benelux by one second after colliding with his main rival George Hincapie in the closing metres of the final stage, when time bonuses were available for the leading finishers. Schumacher claimed he had collided first with a spectator and the race jury accepted his story.

Following his third place in the 2007 world championships in his home town of Stuttgart, Schumacher was arrested for drunken driving. Four months later he revealed that the blood test taken at the time of his arrest had shown traces of amphetamines, whilst denying that he had knowingly taken drugs or had any knowledge of how the positive test had come about. Since a rule change in 2004 amphetamines were no longer on the WADA's out-of-competition banned list; as a result the German federation again exonerated him.

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