Cryptorchidism (undescended testis) is absence of one or both testicles in the normal scrotal position, and it occurs as a result of the testicle falling behind on its normal path of descent. Depending on the testicle location, it can be located intra-abdominally, inguinally or in a high scrotal position. Cryptorchidism can be congenital, when the testicles are undescended at birth, or acquired, when the testicles were descended at birth, but rose from the normal position during life. Congenital cryptorchidism is one of the most common congenital anomalies affecting more than 4% of healthy term newborns. The incidence increases significantly in prematurity and is up to 45%. The etiology has not been fully elucidated, but research shows that various environmental and genetic factors are involved. Cryptorchidism mostly occurs as isolated condition, but in 15-20% of cases it is the part of one of the many syndromes. Cryptorchid testicles, if remain in an abnormal position for a long time, undergo certain histological changes. They lead to reduced fertility and an increased risk for the malignant testicular tumors development. For this reason, guidelines recommend surgical treatment, which should be completed by the age of 12, at latest 18 months. The aim of this paper was to determine whether these guidelines are followed at the Department of Paediatric Surgery of the University Hospital Center Zagreb. We observed the period from the beginning of 2011 to the end of 2020 and collected data on all patients who were operated on for cryptorchidism during that period. 597 patients, aged 0 – 18 years at the time of orchidopexy, were included in the study. Analyzing the data, the average age of 57,8 months at the time of orchidopexy was determined. There are numerous reasons that can be the cause of such late treatment, and additional research is needed to discover and resolve them. In addition, the education of parents, healthcare professionals and patients about the risks of this condition is of great importance.