 For Coritiba, Rafinha made 23 appearances in the 2004 season and scored three goals in 13 appearances in the 2005 season.At Coritiba, Rafinha eventually found his way into the Brazil under-20 national team, and played in the 2005 FIFA World Youth Championship in the Netherlands.During the tournament, he scored two goals and played an integral part in Brazil's progress to the bronze medal.