The authors report a case of a 37 years old man with Behçet's disease since 7 years who develops a destructive chronic polyarthritis involving wrists, hands and one knee. The parallel evolution between recurrent orogenital ulceration and arthritis added to the absence of other associated destructive rheumatism permit to link this polyarthritis to Behçet disease. In spite of the few reports, the occurrence of destructive arthritis can't exclude absolutely the diagnosis of this affection.