my experience in the adolescence was marked by the hospitalization process. currently, as a nursing professional that take care of hospitalized young, there arose inquietudes that originated this study. the investigation object was the significance of the hospitalization in the adolescence, having as objective to understand this significance for the hospitalized adolescent. it was used the qualitative approach in the light of the martin heidegger′s existential phenomenology. the setting was a specific internment unit for adolescents and the deponents were hospitalized young. this study made possible to understand that the adolescent unveiled himself as a being-with and understand of himself as a being in the world thrown to the death. the research pointed to the need of a real implementation of the public policies addressed to the hospitalized adolescent.