Lluís Juste de Nin (1945 – 21 May 2020) was a Spanish illustrator, cartoonist and fashion designer. He worked as creative director for the Spanish fashion label Armand Basi. His work was first published in the 1960s. His cartoons were used in the publications of the political opposition to Francisco Franco. In these publications, Juste de Nin signed his work, "El Zurdo". For many years, he was engaged in creating illustrations for articles by Manuel Vázquez Montalbán in Mundo Obrero.
He is also known as Luis Juste de Nin and Lluis Juste de Nin.