The most common cause of chronic subdural hematoma in pediatric is head trauma. Many cases are not diagnosed immediately due to subclinical course, insignificant signs and symptoms, or delayed admission to the hospital. Here, we reported a rare case of 10 years neglected traumatic subdural hematoma in 11-year-old child due to history of falling and head injury when she was 1.5 years old. No altered mental state or focal neurological deficit was observed; the child presented with moderate headache, deterioration of concentration, and deformity of the cranium. A plain CT head revealed a predominant hyperdense subdural collection mixed with hypodense collection overlying the left cerebral convexity. Craniotomy and membranectomy were performed, then followed by a satisfactory improvement of the cognitive skill of the patient.