Óscar Alfredo Ustari (born 3 July 1986) is an Argentine footballer who plays for Club Atlas in Mexico as a goalkeeper.
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 with the country in 2008.
Born in América, Buenos Aires Province, Ustari arrived in Club Atlético Independiente's youth system at the age of 14. The untimely deaths of club players Emiliano Molina and Lucas Molina – both playing in his position – propelled him to the first team sooner than expected, and he made his first division debut on 5 October 2005 in a 2–0 win against Newell's Old Boys, remaining first-choice with the Avellaneda side in the following tournaments, under both Jorge Burruchaga and Miguel Ángel Santoro (both former players with the club, the latter also a goalkeeper).
On 10 June 2007 Ustari scored from a penalty kick against Quilmes Atlético Club, also leaving the pitch injured and going on to miss the year's Copa América. One month later, he signed for Getafe CF in Spain for €4 million, teaming up with compatriot and goalkeeper Roberto Abbondanzieri; his official debut came on 26 September 2007, in a 1–2 La Liga loss at Valencia CF.