The author analyses a process through which the question of father is modified in adolescence. This process, named affectation of father, must be understood through its articulations with the Œdipus complex, and concerns the contingent father as much as the adolescent. The position of father (symbolical position) is normally supported by two complementary levels : an institutional dimension and a subjective dimension. The emphasis is placed on subjective appropriation of the question of the father-being in adolescent process. Two paradigmatic figures – the sacrifice of Isaac, Noah and his sons – give us examples of the affectation of father, through which the author studies the basic components of the subjective appropriation of father-being.