Renal amyloidosis (RA) is known to be one of the many complications of Behcet's disease (BD) but its frequency has been often underestimated. In this paper, we report on three cases of RA in a series of 105 patients with BD. RA was clinically suspected in our patients by the presence of edema and/or hypotension. The nephrotic syndrome was present in all of them and one patient had associated renal failure. Renal biopsy showed amyloid deposits type AA in all cases.Our patients received Colchicine at doses of 1 mg per day but with disappointing results. Their prognosis was significantely impaired with our three patients dying at ten years, six months and four weeks after diagnosis of RA. We will try, through this clinical experience and based on the relevant literature to better understand this kind of morbid association.