Childhood trauma has been associated with an increased risk of psychosis, a greater severity of psychopathological symptoms, and a worse functional prognosis in patients with psychotic disorders. The current study aims to explore the relationship between childhood trauma, psychopathology and social adaptation in a sample of young people with first episode psychosis (FEP) or at-risk mental states (ARMS). The sample included 114 young people (18-35 years old, 81 FEP and 33 ARMS) who were attending an Early Intervention Service for Psychosis. Positive, negative and depressive symptoms were assessed with the PANSS and the Calgary Depression Scale; history of childhood trauma was assessed with the Childhood Trauma Questionnaire; social adaptation was assessed with the Social Adaptation Self-evaluation Scale (SASS). Structural equation modeling (SEM) was used to explore the relationship between childhood trauma, psychopathology and SASS dimensions in the global sample (including FEP and ARMS). An exploratory SEM analysis was repeated in the subsample of FEP patients. ARMS individuals reported more emotional neglect and worse social adaptation compared to FEP. SEM analysis showed that childhood trauma is associated with a worse social adaptation, in a direct way with domains involving interpersonal relationships, and mediated by depressive symptoms with those domains involving leisure, work and socio-cultural interests. Childhood trauma has a negative effect on social adaptation in young people with early psychosis. Depressive symptoms play a mediation role in this association, especially in domains of leisure and work.