Cristián Alberto Castañeda Vargas (born 18 September 1968 in San Vicente, Chile) is a retired Chilean football player.
He played for a few clubs, including Universidad de Chile and Everton Viña del Mar, his last club was Deportes Arica.
Nicknamed "Scooby" Castañeda played for the Chile national football team and was a participant at the 1998 FIFA World Cup.
He was capped 25 times scoring 1 goal between 1994 and 1998, and made his debut on 1994-03-26.