The problematics ofaddiction is to be understood within its relationship to an object whose status of interiority or exteriority is constantly to be redefined. The clinical case of an adolescent enables one to illustrated the ego addiction to an externalized superego agency, both omnipotent and destuctive, split from its protective centre shielding narcissism. The use of drugs thus enable s one to respond to its contradictory ideals : the acquisition of an omnipotent position and the satisfaction of the chastizing demand without having to conflictualize them pschologically.