A 19-year-old male was diagnosed as having chronic granulomatous disease (CGD) based on negative NBT reduction in January, 1988. He was admitted with a chief complaint of high fever in November, 1988. As abdominal echogram and CT scan established a diagnosis of multiple hepatic abscesses, he was treated with various kinds of antibiotics. Since the therapy was ineffective, the number of circulating neutrophils was decreased, and the abscesses further grew, intravenous drip infusion of rhG-CSF 100 micrograms was initiated in addition to several antibiotics (sulfamethoxazole-trimethoprim, rifampicin, isoniazide, etc). At day 3 on rhG-CSF, the fever began to resolve and on day 15 the body temperature fell below 37 degrees C. The hepatic abscesses also tended to decrease in size and the CT scan performed 2 months later (March 17), disclosed only calcification in the liver. The neutrophil function test indicated that superoxide anion (O2-) and hydrogen peroxide (H2O2) production was slightly increased during rhG-CSF therapy. Combination therapy with rhG-CSF and potent antibiotics showed a favorable therapeutic effect on CGD complicated by multiple hepatic abscesses as a fatal infection.