It becomes difficult to treat the onset of childhood Haemophilus influenza type b( Hib) meningitis due tothe appearance of b-lactamase negative ampicilin resistance( BLNAR). We investigated the clinical featuresof Hib meningitis with subdural lesions. From January 2000 to December 2006, we experienced 8 patientswith Hib meningitis. All patients were not inoculated with Hib vaccine. Five of them were onset under 1year old. Rapid latex diagnoses were made in 5 patients, among whom 4 patients showed Hib positive. Thegenotypes were determined in 4 patients with BLNAR. Combined with cefotaxime sodium (CTX) and ampicillin(ABPC) were used in 3 patients for the initial antibiotics, panipenem/betamipron( PAPM/BP) in 2,meropenem hydrate( MEPM) in 1, MEPM + ceftriaxone sodium( CTRX) in 1, and concomitant use of dexamethasonein 7 paitents. MRI showed subdural hygroma in 4 patients and subdural abscess in 4 patients.Subdural lesions appeared on Day 1 to Day 18 from the onset. Three patients with subdural abscess haveperformed subdural taps, and 2of them with difficulties after subdural taps were necessary to do oral administrationof chloramphenicol( CP).In our report, all of the patients developed subdural lesions. The development of subdural lesions cannotbe avoided with only the conventional antibiotics and dexamethasone therapy. Our cases suggested earliersubdural taps with oral administration of CP might be to improve both the general condition and control thesubdural lesions with Hib meningitis. Moreover, we should pay attention to the preventive vaccination ofHib