Francisco Diego Maciel (born September 17, 1977 in Buenos Aires) is a retired Argentine football who played as a right back.
Maciel made his debut in the Argentine Primera with Deportivo Español on December 8, 1996 against Rosario Central.
In 1998, he was signed by Club Almagro, where he played for the next three years.
Subsequently, his solid performance bought him a transferred to Racing Club.
In his first spell with Racing the club won the Clausura 2001, the first title for the club in 35 years.
In 2002 Maciel moved to Spain and spent some time playing for Real Murcia and RCD Mallorca.
In 2006, he returned to Argentina and got signed by Racing.
His second spell with the academia lasted until late 2007.