Stafne Bone Cavity (SBC) is a radiolucent lesion usually located in the posterior region of the mandible, inferior to the mandibular canal and some SBCs take place in the anterior region or ascending ramus unilaterally. Etiopathogenesis of SBC is still not certain despite there are various theories. SBCs usually do not have any clinical symptoms hence radiographic examinations will be the first step in the diagnosis. It is important to do differential diagnosis properly when the lesions are atypical just as it is in our case. This case report with type-3 SBCs review, aims to define the characteristic features of a giant Type-3 Stafne Bone Cavity with orthopantomography, cone beam computed tomography (CBCT), magnetic resonance imaging (MRI) and histopathological examination.