血祭诽谤（Blood libel[1][2]）指的是一则反犹太人谣言[3][4][5]，声称犹太人会谋杀基督教徒的小孩，用他们的血来进行宗教仪式。该谣言在历史上与井中投毒、亵渎圣体並稱欧洲抹黑犹太人的三大謊言。
Gottheil, Richard; Strack, Hermann L.; Jacobs, Joseph. Blood Accusation. Jewish Encyclopedia. New York: Funk & Wagnalls. 1901–1906 [2021-02-04]. （原始内容存档于2019-12-07）. Turvey, Brent E. Criminal Profiling: An Introduction to Behavioral Evidence Analysis, Academic Press, 2008, p. 3. "Blood libel: An accusation of ritual murder made against one or more persons, typically of the Jewish faith".
Chanes, Jerome A. Antisemitism: A Reference Handbook, ABC-CLIO, 2004, pp. 34–45. "Among the most serious of these [anti-Jewish] manifestations, which reverberate to the present day, were those of the libels: the leveling of charges against Jews, particularly the blood libel and the libel of desecrating the host."
Goldish, Matt. Jewish Questions: Responsa on Sephardic Life in the Early Modern Period, Princeton University Press, 2008, p. 8. "In the period from the twelfth to the twentieth centuries, Jews were regularly charged with blood libel or ritual murder – that Jews kidnapped and murdered non-Jews as part of a Jewish religious ritual."
