This dissertation aims to introduce a project of clinical psychology that takes place in a public school located inside a slum in the city of Rio de Janeiro. It begins with a consideration of what does a slum represent in the social imaginary, how it works in the production of subjectivity of its inhabitants and what are the influences that this context can bring to the constitution of a good enough environment to the development of a child. Child development is described by the views of D. W. Winnicott, who relates the childs interaction with the world based on how did the world interacted with it in early stages of its development. Contemporary social aspects, such as consume, fear, violence and the figures of authority weakness are related with the increase of violence as a valuable expression among children and teenagers. That is, a subjects constitution is within a family, which is anchored in a culture, located in a territory that produces its subjectivity and behavioral patterns. In the end, the psychologist is analyzed as a professional that by the use of its own tools, therapy, holding, technique and creativity, can act inside its specificity without having to dismiss its ethical and political beliefs.