Óscar Alfredo Ustari (born 3 July 1986) is an Argentine professional footballer who plays as a goalkeeper for Uruguayan club Liverpool Montevideo.
After starting out at Independiente he spent most of his professional career in Spain, mainly with Getafe where he had his spell marred by several injuries.
Ustari represented Argentina at the 2006 World Cup, and won an Olympic gold medal with the country in 2008.