Chronic kidney disease indicated the damage of renal structure and function which leads to progressive and permanent damage of excretory, endocrine and metabolic functions of kidney. The dialysis and kidney transplantation are modern methods of replacement treatment of chronic kidney disease. Kidney transplantation is a surgical procedure with possible complications. The purpose of this study was to show the frequency of urological complications after kidney transplantation and to analyze their treatment and outcome. The medical documentation of patients with kidney transplantion operated in University Hospital Centre Rijeka from 30st January 1971 to 31st December 2019, were retrospectively analyzed and urological complications were elaboreted. In the observed period, 1174 kidney transplantations were performed. Urological complications were noticed in the 155 patients (13,3%). The most frequent complications were ureteral stenosis in 52 patients (4,5%), urinary fistula in 50 patients (4,3%), urinary retention in 24 patients (1,9%) and urolithiasis in the eight patients (0,7%). The majority of the patients underwent surgical treatment. Recently, minimally invasive surgery was the method of choice for treatment of urological complications. The result of this study shows that urological complications were not frequent and the most frequent were ureteral stenosis and urinary fistula. Partly urological complications were treated conservatively and partly with surgical approach. In the group of patients that required surgical treatment, endourological methods are currently the initial treatment modality