Oscar Víctor Trossero (15 September 1953 – 12 October 1983) was an Argentine football striker.
He started his career with Boca Juniors but soon left for Racing Club and then Unión de Santa Fe. He played in France where he was quite successful, scoring 48 goals in 114 appearances with FC Nantes, AS Monaco FC and Montpellier HSC. With Nantes, he won the Coupe de France in 1979 and the Division 1 title in 1979–1980. He then came back to Argentina with River Plate. On 12 October 1983, he died from a Cerebral aneurysm in the locker-room after a match against Rosario Central.