Pulmonary arterial involvement is a rare but life-threatening complication of Behçet's disease (BD). A 28-year old male, presented with hemoptysis, fever, dyspnea, weight loss and recurrent oral ulcers was diagnosed with Behçet's disease with multiple bilateral pulmonary arterial aneurysms confirmed following a CT and MRI. scan Besides pulmonary involvement, ocular involvement was also shown. Complete regression was noted during the first year of the therapy with cyclophosphamide and corticosteroid. The patient is still under the hospital for follow ups with favourable outcome predicted.