While only 15 years old, he was first discovered by French actor director Gaël Morel. Morel gave him his first role in a feature film, À Toute Vitesse (Full Speed), released in 1996. Since then, Kéchiouche has acted in most of Morel's works including Premières Neiges in 1999, Le Clan (Three Dancing Slaves) in 2004 and Après Lui in 2007. While working with Gaël Morel Kéchiouche developed his passion for acting, which he decided to make his career. He entered acting school and graduated in 2002.
Salim Kechiouche now lives in Paris, dividing his time between cinema and the stage.Painters and photographers have shown great interest in exploiting his striking good looks and his sleek physiognomy. Among these artists, Pierre et Gilles produced photographs and paintings related to Les Amants Criminels and for the play Vie et Mort de Pier Paolo Pasolini in 2003. Youssef Nabil and Michel Giliberti explored the dark side of Kéchiouche's looks through a dozen paintings in 2005 and 2006. Kéchiouche appeared alongside French actress Julie-Marie Parmentier in the photo series Doppelgänger in the year 2007 by French photographer Raphaël Neal.