Ernst Degner (born Ernst Eugen Wotzlawek on 22 September 1931 in Gleiwitz, Upper Silesia, Germany - died 10 September 1983 in Arona, Tenerife, Spain) was a German professional Grand Prix motorcycle road racer. Degner was noted for defecting to the West in 1961, taking MZ's tuning techniques to Suzuki, and winning Suzuki's first Grand Prix championship in 1962.

Degner's father died just before the end of World War II. Degner, his older sister and their mother fled from their home in Gleiwitz (now Gliwice, Poland) to avoid the advancing Russian army and wound up in Luckau German Democratic Republic (East Germany) at the end of the war. Degner's mother died shortly thereafter. He attended Potsdam Technical High School and was awarded a diploma in development engineering in 1950. He became an apprentice motorcycle mechanic in Potsdam.

In 1950 Degner joined the Potsdam Motorcycle Club where he met Daniel Zimmermann who had built an exceptionally fast 125cc racing motorcycle based on the DKW RT125. It was called the ZPH in recognition of its designer and engineer (Daniel Zimmermann), its rider at that time (Bernhard Petruschke) and its mechanic (Diethart Henkel). The ZPH proved faster than the East German factory IFAs (later renamed MZ) whose machines were also based on the DKW RT125. Degner started racing in 1952 and after a successful season he obtained his licence to ride in the "Ausweisklasse" in 1953. The 1953 season saw Degner record his first victories at the Leipziger Stadtpark and Bernau meetings. He ended the season as runner up in the 125cc Ausweisklasse. Zimmermann provided him with a ZPH engine which Degner used to finish runner up to Horst Fugner in the 1955 East German 125cc Championship.

His racing successes on the ZPH were noted by the MZ team manager, Walter Kaaden, who signed Degner as an engineer/rider for the Zschopau factory, but only after Degner had secured employment for his girl friend Gerda Bastian with the factory . Degner started his employment with MZ on 1 March 1956. Degner raced successfully for the East German manufacturer which used two-stroke engines, for which Kaaden had discovered principles regarding how sound waves and expansion chambers affect engine tuning. In 1957 he won 11 out of 14 125cc races which he contested for the factory, and finished the season as the 1957 East German 125cc road racing national champion. From 1958 the factory entered Degner in all the world Championship races and he scored his first world championship victory at the 1959 125cc Nations Grand Prix at Monza. He ended the season ranked fifth in the 125cc world championship and fourth in the 250cc world championship. A fall in practice at the Isle of Man TT races, the opening round of the 1960 World Championship series damaged his quest for the 125cc World Title, but his second Grand Prix victory at the Belgian Grand Prix meant that he finished third in the 125cc world championship.

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