We encountered a 5-month-old baby with shaken baby syndrome, which had been caused by being thrown up about 50 cm in the air several times by his father. Intracranial hemorrhage, bleeding in the eye grounds in both eyes, and convulsion were noted on admission. Shaken baby syndrome was diagnosed from the history, and the patient was given necessary treatment, which led to favorable prognosis. Father was not aware of the danger of handling his baby in that way, and no sign of maltreatment was noted on the body surface of the baby. An attention should be payed that the danger leading into syndrome could be hidden among this kind of caring in the everyday life.