First conceive as a way to give a family to abandoned children, adoption legislation in Quebec now persues many goals. She removes custody from parents juged unsuitable and offers legal recognition to step-parents or intended parent of child born from gestational surrogacy. The impact on the child vary accordingly. In Quebec, the fight for the child rights to know his origins tend to relegate to a secondary level the question of  kinship links. Recognition of family ties prior adoption are usually limited to the identity of the biological parents. Looking at the history of adoption in Quebec, the separation with the biological family has not always been that clear. This conference will overlook at how adoption legislation changed from 1924 to nowaday combining anthropological and legal perspectives.