Jean Lemoine, Jean Le Moine, Johannes Monachus (born 1250 at Crécy-en-Ponthieu, died 22 August 1313 at Avignon) was a French canon lawyer, Cardinal, bishop of Arras and papal legate.
He served Boniface VIII as representative to Philip IV of France, and founded the Collège du Cardinal Le Moine, in Paris.
He is the first one to formulate the legal principle of the presumption of innocence.