Chronic subdural hematoma is usually caused by minor head trauma and occurs frequently with older people. Predisposing factors include alcohol abuse, epilepsy and coagulopathy. This report presents a 65-year old woman who had a large, mixed density, left sided compressive chronic subdural hematoma diagnosed by computed tomography. She also displayed a moderate neurological deficit on admission, confusion and behavioral disorder with Glasgow Coma Score 10. The computed tomography and neurological parameters indicated the necessity of surgery. A difficult general condition and coagulation factor disorder in this patient were determinative for the decision for non-operative treatment. It is very rare that a large chronic subdural hematoma is resolved completely spontaneously, but in our case conservative treatment gave an excellent result.