Type IIIb liver injury by classification of Japanese association for the surgery of trauma is a most severe type of blunt liver injury and its prognosis is very poor compared with other types of injuries. We experienced a case of type IIIb liver injury which was successfully treated with a right hepatectomy and gauze packing, so-called staged laparotomy. A 28 year-old woman was injured by a traffic accident and a CT scanning showed a widespread liver injury in the right lobe with massive intraperitoneal hemorrhage. Hemodynamic state on admission was stable, but soon became unstable in the emergency room. Right hepatectomy was performed because of massive injured volume and no sign of coagulopathy. But after the hepatectomy, coagulopathy was revealed and gauze packing was immediately performed. In ICU, coagulopathy was improved but intraperitoneal bleeding continued, and 2nd laparotomy was decided for intra-abdominal hypertension. In the 2nd laparotomy, the hemorrhage from the stump of the liver was almost controlled that demonstrated the effectiveness of Gauze packing. Staged laparotomy with gauze packing is recommended for the treatment of severe blunt liver injury from the standpoint of damage control surgery. Staged laparotomy was very effective for our case but early gauze packing before coagulopathy might be more effective.