Myofibroma (MF) is a benign proliferation of the myofibroblasts and classified as MF for solitary lesions (SMF) and MF for multicentric (MMF) lesions. These soft-tissue tumors exhibit a distinct predilection for occurring in the head and neck region while the most common oral location is the mandible. A 12-year-old male patient was referred to the Department Of Erciyes University Dentistry Faculty for the painless mass in the left posterior mandible. Clinical examination showed an expansive soft tissue mass in the retromandibular area associated with alveolar crest. An incisional biopsy was performed and SMF was confirmed, histopathologically. During the follow-up period for 24 months, no recurrence was observed.