Summary. Hypertension frequently occurs in patients with renal transplant. The aim of the present study was to determine the incidence, time of occurrence and hypertension severity following transplantation. A total of 78 patients (37 women and 41 men) mean age 49.9±12 years were included in the study. The post-transplant period amounted from 6 to 168 months. Prior to transplantation, hypertension was registered in14 patients (17.9%). Following transplantation hypertension was registered in 59 (75.6%). During the first post-transplant year hypertension occurred in 79% of patients, while in the period of one to three years in 13.5% and in 6.7% of patients with transplant performed three or more years earlier. Hypertension responsive to only one drug was found in 22%, and to two or more drugs in 25% of patients. The satisfactory blood pressure values were obtained in 78% of patients. The study reveals that hypertension in the majority of renal transplant patients develops during the first post-transplant year.