Aim: Sialolith is defined as the presence of one or more oval or round calcified structures (called saliva stones or stones) within the canal of a large or small salivary gland. Sialolith is the second most common disease of the salivary glands after mumps. The aim of this study is to present a case of large sialoliths radiologically and to contribute to the literature. Case: A 46-year-old male patient was admitted to the Department of Oral and Maxillofacial Radiology in İstanbul University for his dental treatment. As a result of radiographic examination, the patient had severe bone loss due to periodontitis, residual root in tooth 46, dental caries and a radiopaque formation in the right mandibular angulus region. In the cone-beam computed tomography examination of the patient, hyperdense focus was observed in the right angulus region, lingual area, submandibular salivary gland region in soft tissue, and hypodense-hyperdenes 9.7x11.3x12.5 mm in size. Result: Most submandibular stones are identified as radiopaque formations on radiographs. Clinical and radiographic findings are important in determining the exact location and size in order to determine the correct treatment for the patient. In our case, con-beam computed tomography and Ultarsonography were used.