Duca Leindecker (born April 5, 1970) is a Brazilian singer, composer, multi-instrumentalist and writer, leader of the band Cidadão Quem.

[1] Born in Porto Alegre in 1970, he began playing various instruments, and at when he was seventeen years old he recorded his first solo album and, in the early 1990s, was invited by Bob Dylan to open his shows in Brazil.

He recorded seven CDs with the Cidadão Quem group and participated to Rock in Rio III.

From 2008 to 2012 Duca dedicated himself to the duo Pouca Vogal, with Humberto Gessinger, leading to the release of two albums.

From 2001 to 2012 he was married to actress Ingra Liberato, with whom he had his first child, Guilherme, born on July 11, 2003, in Rio de Janeiro.