Jean-Jacques Nattiez, OC, CQ, FRSC (French: [natje]; born December 30, 1945, Amiens, France) is a musical semiologist or semiotician and professor of Musicology at the Université de Montréal. He studied semiology with Georges Mounin and Jean Molino and music semiology (doctoral) with Nicolas Ruwet. He is a noted specialist on the writings of the composer and conductor Pierre Boulez. In 1990, he was made a Member of the Order of Canada. In 2001, he was made a Knight of the National Order of Quebec.