A b s t r a c t Objective: The aim of our study is to evaluate complications in patients who underwent a Transrectal Ultrasound Guided Prostate Biopsy (TRUS BP) at the Department of Urology of JFM CU and UHM in 2007-2008 and at the Department of Urology in Bojnice Hospital in 2009-2012. Methodology, disclosures: In our study, patients with positive digital rectal examination (DRE) and/or with higher prostate specific antigen (PSA) levels (>4 ng/ml) are included. We excluded patients with PSA levels greater than 50ng/ml, as well as patients with less than 8 biopsy cores. The number of examined patients fulfilling the criteria was 474. An average age of them was 66.3 years (SD±8.3years). As an antibacterial prophylaxis, the patients were given fluoroquinolons in a dose of 500mg twice a day during a 3-day course of antibiotics, while the first dose was given one day before the procedure. In high risk patients, we used a single intramuscular dose of gentamycin 160mg right before the procedure followed by fluoroquinolons for the next five days.Results: The most severe complication was vasovagal reaction, which occurred in 9 (1.9%) cases. Haematuria occurred in 122 (25.7%) cases up to 3 days and in 10 (2.1%) patients up to 7 days. Six patients (1.3%) required hospital admission for severe haematuria. Dysuria occurred in 71 patients (15%). Rectal bleeding occurred in 90 (19%) cases with an average 2 days of bleeding, from which 7 patients were admitted to hospital and administered haemostyptics. From the mentioned count, 2 (0.4%) patients underwent a rectal tamponade and one (0.2%) patient with arterial bleeding underwent an arterial ligation of a stricken artery. Haemospermia occurred in 71 (15%) cases. 23 (4.9%) patients suffered fever above 38°C, within whom in 7 (1.5%) cases was microscopicaly proven urinary tract infection requiring hospitalisation lasting 7 days on average. Sepsis occurred in 3 (0.6%) patients, symptomatic bacterial prostatitis in 6 (1.2%) cases and urinary retention occurred in one (0.2%) patient. There was not any significant higher amount of complications in between 8-core and 10-core biopsy (P=0.26), not even in between 8-core and 12-core biopsy (P=0.32).Conclusion: TRUS PB is a safe procedure with quite a low risk of complications. An important moment is a close monitoring right after the procedure. The most of the complications may persist for around two weeks and are treated conservatively without persistent effects. Prophylaxis with broad spectrum antibiotics may provide an adequate coverage and lowers the risk of infectious complications.