This final work investigates the quality of life of patients at the Forensic Psychiatry Department of the Psychiatric Hospital Rab. The Forensic Psychiatry Unit provides mental illness to treatment, supervision, care and legal protection. Legislative regulation protects mentally ill persons from themselves, but also the social community that may sometimes be endangered by mentally ill persons. The aim of this final work is to examine the quality of life of hospitalized patients at the Forensic Psychiatry Department of the Psychiatric Hospital Rab and to see if the ways of coping with stress influence the quality of life in the examined groups. Questionnaires were conducted with a total of 90 respondents. The research part of the work was carried out from March 15 to March 26, 2018. The study included patients at the Forensic Psychiatric Unit at the Psychiatric Hospital Rab (total of 30 patients), patients at the Department of Addiction Diseases (altogether 30 patients), and the "healthy population", ie the Psychiatric Hospital Rab (total 30 employees). For the research part of the work, respondents filled out 3 questionnaires. The results of the research showed a difference in the subjective assessment of the quality of life among the investigated groups from the Department of Forensic Psychiatry (FOR), the Department of Diseases and Addictions (BOP) and the control groups (employees of the Psychiatric Hospital Rab). It is important to point out that the control group has statistically significantly demonstrated a higher degree of subjective quality of life estimation, as opposed to the examined patients, so we come to the conclusion that such results were expected. Respondents located at the Forensic Psychiatric Unit report lower family support compared to the other two groups, which is often associated with criminal measures and the reasons for hospitalization of patients. Furthermore, it is necessary to point out that there is no difference in attitudes regarding gender of respondents. Also, highly educated individuals with a better socioeconomic status have often estimated their quality of life better. It should be noted that patients at the Forensic Psychiatric Unit of the Psychiatric Hospital Rab have lower quality of life compared to control groups. Patients at the Forensic Psychiatry Department The Psychiatric Hospital of Rab is the longest hospitalized hospital and often there is no family support that contributes to a lower quality of life. The use of psychosocial interventions and the active inclusion of patients in occupational occupational therapy have a protective factor, as they result in the use of more functional coping styles and thus higher quality of life.