The association of chronic subdural hematoma (CSDH) and arachnoid cyst (AC) is uncommon.We reported 2 juvenile athletes with CSDH associated with AC which occurred in their daily sports activities and reviewed the literature. Both of them were treated surgically, with satisfactory outcome. AC is a common predisposing factor in young patients with CSDH. The complication of intracranial bleeding is an indication for surgical management. Though there are still controversies in the treatment of asymptomatic AC, it is the consensus that the patients with AC should avoid violent sports so as to reduce the incidence of intracranial hemorrhage resulted from head injuries.