1. Purpose The accurate diagnosis and proper treatment of group A streptococcus should be emphasized concerning about possible development of late sequelae. Such as acute rheumatic fever and acute glomerulonephritis. We should like to know the rate of beta-hemolytic streptococci by throat swab culture at the in ?patient. 2. Methods The throat swab cultures and filled up flow-sheets were undertaken on 619 children who had admitted to hospital. KyungHee university hospital from may 1994 to april 1995 prospectively. At the same on admission. Throat culture was performed. 3. Results The highest recover rate of BHS (Beta-Hemolytic Streptococci) and GAS (Group A Streptococci) were seen in above 10 years old. As 9.1% and 1.9%. BHS were obtained in 39 cases (6.3%) among 619 children while GAS was obtained in 3 cases (0.4%). Among 39 specimens of BHS. 33 specimens were classified as non-grouping streptococcus. 4. Conclusion The poor recovery rate of GAS inpatient compared with normal carrier rate is likely due to possible antibiotic abuse. errors in processing samples. And epidemiologic factors such as seasons and geographic areas. It is necessary to evaluate the clinical significance of non-A, B, C, D streptococcal infections and carriers.