During the period of four years and three months from January 1985 to March 1989, 29 cases in 27 ptients with traumatic epidural and subdural hematomas which resolved spontaneously on sequential CT examinations at the hanyang University Hospital show the following results. 1. Of 29 hematomas there are 20 epidural hematomas including 9 cases (45%) in parietal area and 4 cases(20%) in frontal area and 9 subdural hematomas iacluding 6 cases (66%) in temporal area. 2. the thickness of all hematomas in less than 2 cm. 0.5cm in 5 subdural hematomas(56%) 3. The size decreace and comple resolution of hematoma within 4 weeks show 24 of 29 hematomas(83%) of which 18 hematomas(62%) show that between 2 and 4 weeks. 4. no difference between absorption rates of hematomas as the degrees of type or size of hematomas is present.