This paper explores the rights of the adopted child arising from the legal relationship created between the former and his or her adoptive parents. The existing law in Indonesia in this regard creates a legal fiction where the act of adoption or raising a child ( adoption) which involves the taking another person's child is admitted into the unit and then attains a legal status equivalent to those the biological children with appurtebant right including use of the surname of adoptive parents, exsclusion of parental authority of the biological parents, and inheritance. The implication of the bestowing of equivalent status and rights as those of biological children are likewise discussed in this paper.