-Introduction:Intraosseous mandibular haemangiomas are rare benign tumors.To this date there is no general consensus regarding their treatment. Observation: The authors present a case of a 56-year-old patient with swelling of the basilar left edge, without any other associated symptom. Radiolucent images with a well-defined honeycomb structure supports the vascular injury found using dental orthopantomography and cone beam computed tomography. Dynamic magnetic resonance angiography (MRA) showed mild intense intralesional vascularity and a biopsy confirmed the diagnosis of mandibular cavernous haemangioma. Clinical and radiological active surveillance were carried out. The size of the lesion had regressed by more than half in one year and there was no more palpable lump. Discussion: The most commonly approved treatment approach of haemangioma is selective embolization followed by complete surgical resection, which may be complicated by bleeding. From the follow-up of this case it seems that an active clinical and radiological surveillance can be proposed in the management of intraosseous mandibular haemangioma with few persistent symptoms and a low risk of complication, these may even regress with time.