Authors report rapid resolution of an 8-year-old boy's subgaleal hematoma with skull fractures by taking “Jidabokuippo” orally. He was hospitalized for the treatment for brain contusion, depressed skull fractures, and subgaleal hematoma. He underwent the reconstruction of the skull 9 days after the injury. The temporal muscle and scalp were fixed to the skull with sutures through screws and V-shaped holes in the skull. However, the subgaleal hematoma worsened on the next day of the surgery. He began to take Jidabokuippo on the third day of the surgery. The hematoma nearly disappeared on the fifth day of surgery. It is said that Jidabokuippo has anti-congestive and anti-inflammatory action. Authors think that this action of Jidabokuippo caused the resolution of hematoma.