Slobodan Trninic (born 14 January 1953) is an award-winning Croatian cinematographer.
Trninic graduated from the University of Zagreb Academy of Drama Arts in 1979, and his first feature film was the 1991 Yugoslav film Virgina (Serbo-Croatian: Virdžina), directed by Serbian director Srdan Karanovic.That same year Trninic shot Rajko Grlic's film Charuga, and in 1993 he shot The Golden Years (Croatian: Zlatne godine; directed by Davor Žmegac), a drama for which he won the Golden Arena for Best Cinematography at the 1993 Pula Film Festival, the Croatian national film awards.He continued to work with a number of films in Croatia and abroad, and in 2010 he won his second Golden Arena for his work on Just Between Us (Croatian: Neka ostane medu nama; directed by Rajko Grlic).