Introduction: Schizophrenia is a disabling mental illness that affects the quality of life of both the sufferer and their caretakers. Research has shown that quick diagnosis and treatment of the first episode is associated with better prognosis. Objective: In this paper, the design and evaluation of a community intervention for early detection of the first episode of psychosis in three sectors of the country (municipalities of Iquique, La Granja and El Bosque) is described. Materials and Methods: For the evaluation, a qualitative, ethnographic methodology was used, based in semi-structured and group interviews with different categories of participants (teachers, coordinators, medical professionals and non-medical professionals). Results: Evaluation of this intervention shows that the objectives were fulfilled unequally. A high level of participation was obtained from doctors and teachers, and the training was positively evaluated. Conclusions: The main recommendations were, 1) obtain political support (local health authorities), 2) create and manage close relationships within the research team, and 3) modify the intervention to serve the needs and values of each community.