Earlier research has shown that clinical supervision was beneficial for caregivers within forensic psychiatric care. Clinical supervision enabled caregivers to develop their professional skills, reduce anxiety and conflicts, develop and improve relationships with co-workers and patients. Clinical supervision could be used as a method to develop quality of care. Clinical supervision seemed to have a positive effect on nursing care, although some reasearchers claimed that more empirical studies were needed to evaluate the positive effects of clinical supervision. The aim of this study was therefore to examine in what way clinical supervision of caregivers inpacts the care and the quality of care in forensic psychiatric units. An empirical study with qualitative semi-structured interviews was preformed. Data regarding the experience of clinical supervision and clinical supervisions' inpact on care and quality of care was analysed by the means of qualitative analysis. By this analysis six themes were identified. The result of the study indeed shows that clinical supervision is beneficial for caregivers and their professional skills. The result also shows that clinical supervision could benefit inpatient relationships, inpatient care and improve the co-operation in the staff group. The study shows that for example trust, communication, empathy and acceptance could improve by clinical supervision, but the result also shows that some of interwievees thought that these elements of care were not effected by clinical supervision in any way. These elements were seen as basics of the care. Thus the different thoughts of clinical supervision, the study shows that clinical supervison has a positive effect on the quality of care.