The real time high resolution mechanical neurosonographic sector scanner is a convenient and useful instrumentfor detection of intracranial lesions in premature infants as well as low birth weight. From this experience, authors report with 104 neonates and infants who had been suspected intracranial hemorrhage and had been detected and graded by sonography. The result were as followed : 1. The incidence of intracranial hemorrhage is 20 of 46 (43.5%) neonates who had been studied before 3 days of age. But 7 of 16 (43.7%) neonates showed ICH between the 407days of age. 2. There was no difference of prevalence in sex ratio in neonates with ICH. 3. There was close relationship between ICH and gestational weeks. 15 of 27(55.6%) neonates who were born under 32 gestational weeks showed ICH. 4. 10 of16 (62.5%) neonate who were born under 1,500 gram body weight had ICH within first 4 days. The severity of ICH was graded as 3 or 4 in 7 of 10. 5. The mode of delivery influenced neonatal CH in case of difficulty delivery such as forcep(4/4, 100%), vaccum(7/10, 70%), breech (3/3, 100%), and C/S (13/33, 39.4%). 6. Incidence of ICH in neonates with pathologic lung conditions (29/40, 72.5%), was higher than ICH with normal chest findings(15/64, 23.4%). 7. For frequent follow up study of brain, neurosonography was very helpful and economic in case of ICH,and could find congenital glioblastoma multiforme(1), and low grade astrocytoma(1) incidentally.