Lorenzetti was born in Rafaela, Santa Fe Province. He is the son of a primary school teacher and a travelling salesman.  He went to school at the National University of the Littoral. He became a lawyer in 1978.
References[change | change source]
- Clarín, 12 June 2005. Lorenzetti: "Sería bueno para Kirchner no nombrar más jueces en la Corte".