Two clinical cases will be used to support the thesis that the term “biological parent” is without meaning, an impossible (real) that is unsettling for adopted children. This would be the case for any child, even one who was not adopted, for whom the notion of biological parent belongs to the register of the unsaid. The biological parent belongs to the real and has no place. He/she is an oxymoron. Only parents who assume the responsibilities of parents count for the child. They are the parents the child has adopted.

Adolescence, 2016, 34, 4, 763-772.