Slobodan Kačar (Serbian Cyrillic: Слободан Качар; born 15 September 1957) is a retired Serbian boxer who was the IBF Light-Heavyweight world champion.

He won the Light Heavyweight Gold medal for Yugoslavia at the 1980 Summer Olympics.

Kačar turned professional in 1983 and won his first 21 fights, including a victory over Eddie Mustafa Muhammad to capture the vacant IBF Light Heavyweight Title.

Kačar lost his next fight, a defense against Bobby Czyz in 1986, via 5th-round TKO.

[1] His elder brother Tadija Kačar won a silver medal in boxing at the 1976 Summer Olympics.