A week's clinical work with a four-year-old child is reported. The results not only seemed to verify Winnicott's concept of the use of an object but made it possible to extend the concept tentatively. The thesis of the paper is that if the subject is able to use the object, a further step may lead to a dimension of experience in which the different stages of relationship between subject and object, as Winnicott has described them, may also occur in the intrapersonal field of the subject's relation with the subject himself. The preconditions for such an encounter of subject with subject are discussed and an attempt is made to define the subject's use of the subject.