Playing is presented as a fundamental part of the psychic process of building subjectivity, and thus, the baby s first exchanges with the mother or adult caregiver function as the relational founding foundations of our psyche. In this way, the present research proposes to present the playing as structuring for the subjective constitution process from the intersubjectivity, focusing on the baby s first relations, in the egoic integration process, in the difficulty of playing with the adult and in the therapeutic setting as an environment facilitator. To achieve this goal, the text develops the notion of continuity and discontinuity in the subjectivation process, using clinical illustrations to discuss how playing presents itself in the therapeutic space. The importance of the presence of the family in psychotherapeutic treatment is highlighted, as well as the possibility of building a therapeutic bond that allows the co-construction of a new history.