Acute respiratory infection is the common disease which causes the highest child mortality rate among acute child infectious diseases. There is a wide variety of causes of pneumonia: virus, bacteria, fungi, parasite. Haemophilus influenzae (HI) bacteria is one of a source of the pneumonia in children. The previous studies had proved that HI was sensitive to many different antibiotics. However, reality has shown that many antibiotics are ineffective in treating pneumonia due to HI. Hence, the authors have been conducting the research on clinical and para-clinical features and antibiotic sensitivity of Haemophilus influenzae. The authors investigated 54 cases of pneumonia due to HI. The results revealed that the group of children got the highest rate of catching the disease, accounting for 66.7 percent. The proportion of baby boys to baby girls was 2.6/1. The median time of catching disease before hospital admission: 4.3 + or - 2.3 days. The rate of patients -taking antibiotic before hospital admission was 72 percent and 68.5 percent (CRP 6mg/l and white blood cell 10.000 g/l). Some highly effective antibiotics against HI were Imepenem (100 percent), Meropenem (100 percent), Ciprofloxacin (96.3 percent), Azithromycin (92.6 percent) . HI was most resistant to some following antibiotics such as: Cotrimoxazol (96.3 percent), Cefepim (70.4 percent), Ceftazidim (59.3 percent).