The increase in the number of children diagnosed with Autism Spectrum Disorder invites us to reflect on what would be causing this effect, making it a Public Health issue, since these demands are directed to children's Reference Units. The research used was of the clinical-qualitative type (TURATO, 2013), based on the psychoanalytic theory, being analyzed from a clinical case. This work was submitted to and approved by the Research Ethics Committee, under protocol number 2,218,982. The experiences in the consultations provided reflections on the role of the analyst's body in the treatment of autistic children, understanding it as a facilitator in the construction of a bond between therapist-patient and a holding environment that welcomes the individual in its own way. Research on the analyst's body becomes relevant, since it can be understood as an instrument of action for the professional who works in the autism clinic. From this, the objective was to demonstrate the effects of the analyst's body function in the treatment of a child with suspected diagnosis of Autism Spectrum Disorder. It is concluded that the analyst's body, when serving as a welcoming environment, favors the construction of a sensorial relationship and the emergence of the Self.