Mariela Andrea Antoniska Arrondo (born May 20, 1975 in Banfield, Buenos Aires) is an Argentine field hockey goalkeeper, who won the silver medal with the national field hockey team at the 2000 Summer Olympics in Sydney, the bronze medal at the 2004 Summer Olympics in Athens, the 2002 World Cup, the Champions Trophy in 2001, two Pan American Games and the Pan American Cup in 2001.