The residual cysts are retained radicular cysts within a jaw after tooth extraction. They are approximately 10% of odontogenic cysts. Their clinical features and radiological findings are the same as radicular cysts. Residual cysts can be retained within a jaw from 1 to 20 years. In asymptomatic cases of residual cyst is determined size decreasing with age is getting on. Diagnosis and surgical management are the same as radicular cyst. In this case report, a 56 year old female patient presented with a painless swelling of approximately 2x2 cm in size, on the maxillary right front region since 7 months. Clinical examination, diagnosis, surgical protocol is reviewed.