Totally 48 cases with diagnosed as community-acquired pneumonia who were treated in intensive care units of two different university hospital included to the study. The mean age of cases was 67.8, 29 were males and 19 females. Glasgow Coma Score (GCS), Acute Physiology Assesment and Chronic Health Evaluation II (APACHE II), Pneumonia Severity Index (PSI) and Sequential Organ Failure Assessment Score (SOFA) of 46 cases were determined. The most common comorbid disease was cerebrovascular disease. We determined that microbiological tests were made in 30 cases and pathogen agent was established in 7 cases of them. The mean lenght of stay in hospital and intensive care unit were 16.1 days and 8.8 days respectively. The mean GCS was 11.4, the mean PSI was 130.7 and 38 cases were in high risk classes. The mean APACHE II and SOFA scores were 20.7 and 4.4 respectively. We determined that hypotension and intubation increased the mortality risk. The mean blood urea nitrogen, %PNL and respiratory rate were higher in cases who were died. The mortality rate in group 3b and group 4 were respectively 41.2% and 44.0%. Totally 20 (41.7%) cases died.