Ojectives: To estimate the prevalence of erectile dysfunction (ED) in BPH patients. Patients and methods: Cross-sectional study was conducted between Juanary 3013 to May 2013 included 83 patients. the authors use the International Index of Erectile Dysfunction (IIEF) to indentify mild, moderate and severe ED. Results: The prevalence of ED was 78.3 percent. The prevalence of mild, moderate and severe ED was 19.3 percent, 31.3 percent and 27.7 percent, respectively. The prevalence and severity of ED increased with age and severity of LUTS. Conclusion: The study showed a closely positive correlation between ED with age and level of lower urinary tract obstruction in patients with BPH.