Der Sieg des Glaubens (English: The Victory of Faith, Victory of Faith, or Victory of the Faith) is the first Nazi propaganda film directed by Leni Riefenstahl. Her film recounts the Fifth Party Rally of the Nazi Party, which occurred in Nuremberg, Germany, from 30 August to 3 September 1933. The film is of great historic interest because it shows Adolf Hitler and Ernst Röhm on close and intimate terms, before Hitler had Röhm killed during the Night of the Long Knives on 1 July 1934. As he then sought to remove Röhm from German history, Hitler ordered all known copies of the film be destroyed, and it was considered lost until a surviving copy was found in the 1980s in East Germany.

The form of the film is very similar to her later and much more expansive film of the 1934 rally, Triumph of the Will. Der Sieg des Glaubens, which was funded and promoted by the Nazi Party, celebrates the victory of the Nazis in achieving power when Hitler assumed the role of Chancellor of Germany in January 1933, and is considered Nazi propaganda.