In 17 patients at different time after transplantation of the allogenic kidney, artery stenosis of the transplant accompanied by gross hypertension and deterioration of renal function was registered. To diagnose the pathology isotope renography with I131 hippuran, rheography of the transplant, thermometry, thermography and selective angiography were used. Five patients were operated on. They successfully underwent different reconstructive procedures on the affected renal artery of the transplant. As a result arterial pressure returned to normal in all the patients and the transplant's function improved. Four patients underwent balloon dilatation of the stenosed renal artery. The effect was temporary.