Jaques Morelenbaum (Portuguese pronunciation: [ˈʒakiz moɾelẽˈbaw̃], Rio de Janeiro, May 18, 1954) is a Brazilian instrumentalist, arranger, conductor, composer and music producer.

Morelenbaum is the son of conductor Henrique Morelenbaum and piano teacher Sarah Morelenbaum. His siblings are Lucia Morelenbaum, clarinetist of the Brazilian Symphony Orchestra; and Eduardo Morelenbaum, conductor, arranger and instrumentalist. He is married to the singer Paula Morelenbaum.