Mucosal melanomas can occur at various different sites and have an incidence of about 1% among all melanomas. They are usually diagnosed at an advanced stage with a poor prognosis, mostly because it is quite difficult to catch the early signs and symptoms of a mucosal melanoma due to its anatomic localization. In addition, the prognosis of oral melanomas is worse than the melanomas of skin as local recurrence is very common in patients with oral melanomas. Meticulous surgical excision with clear margins is the only potential curative option for mucosal melanoma. Here, we present a rare case of an oral mucosal melanoma of the left lower alveolar mucosa in a 32-year-old male patient.