Introduction. There is a strong correlation between medical activities and stress accumulated over years of work. However, the COVID-19 pandemic has highlighted the importance of the mental state of medical workers and highlighted the need to assess the degree of BOS. The aim of the study: to evaluate BOS among ICU medical staff in the tertiary hospital. Material and methods. A number of 62 doctors, nurses and auxiliary personnel were interviewed, divided into 2 groups (ICU-COVID-19 and ICU-non-COVID-19 units), from Intensive Care Unit (ICU). The Maslach questionnaire was applied, including 25 items divided according to: emotional exhaustion, depersonalization, and personal achievements. Results. BOS was determined in both groups (53.3% in ICU-COVID-19 vs 46.67% in ICU – non-COVID-19). The high level of BOS was found in all medical staff in ICU-COVID-19, therefore, medium level was almost equally distributed in both groups. ICU-COVID-19 doctors showed the high level of emotional exhaustion in 100%, and nurses revealed this aspect in 58.3% cases vs. 20% ICU-non-COVID-19. The depersonalization was assessed in 45% of ICU-non-COVID-19 medical staff (doctors – 20%, nurses – 25%). The ICU-COVID-19 doctors were more empathetic towards patients' suffering (66.7%), and 60% of ICU-COVID-19 nurses showed reduced personal achievements. ICU-COVID-19 nurses are twice more affected in this field compared to ICU-nonCOVID-19 nurses (60% vs 25%). The data showed that nurses were more affected by BOS regardless the units they are working in. Conclusion. Medical staff in ICU units are affected by BOS.ICUCOVID19 medical personnel are more affected. Doctors have the highest degree of BOS.