During his second year racing as a professional, 1936, he won the 19th stage of the Tour de France and finished in 9th place in the general classification.
His most successful year was 1938. He won the World Championship in 1938. Because of World War II there were no World Championship races held for several years after his win. This makes Marcel Kint the longest reigning World Champion. At the 1938 Tour de France he won three stages (15, 16 & 18) and finished ninth in the overall general classification.
Kint was very successful at one day classic races. He holds the record for three consecutive wins at La Fleche Wallonne in the years 1943, 1944 and 1945. The 1943 edition of Paris-Roubaix is one of his greatest victories.
Marcel Kint also had several major track racing victories during his career. Of note are his 1948 and 1949 at the Brussels Six Day Races with partner Rik Van Steenbergen.
|Marcel Kint wearing the Belgium National Champion's Jersey. 1945|