The family has a major role in the emotional development of children and is able to play a facilitating role in understanding their symptomatology. This work presents a family diagnosis interview as a technique used in the process of screening children in a school clinic to assist the understanding of the case attended. For this, it will be presented a clinical case of an eight-year-old male who was seen in the "Serviço de Triagem e Atendimento Infantil e Familiar" (STAIF) of the Center of Research and Psychology (CPA) of FFCLRP of São Paulo's University (USP).