Hospitalization for patients with psychiatric disorders involves situations such as getting away from their usual environment and being together with unfamiliar people. The aim of the present research was to evaluate the effect of therapeutic atmosphere in a psychiatry clinic on social functionality of in-patients. Method: The research has been planned as a descriptive and relational type and conducted with 50 patients who accepted to participate in and who had been hospitalized in Psychiatry Ward. Psychiatric disorders lead to serious psycho-social limitations for the patients. Deterioration in social functionality takes part in the first order among those limitations. This is also defined as not being able to perform oneâ€™s social roles. Self-care ability of the subjects who have impaired functionality is weak and participation in spare-time activities is limited.