There has been a great evolution in the field of male erectile dysfunction after the establishment of factors that play major roles in the penile erectile physiology. Any disorder affecting these factors which include vessels, smooth muscle, neurotransmitters and hormones may alter the erections of a healthy man. Erectile dysfunction caused by any cancer treatment modality has a great impact on quality of life. Preservation of potency remains a primary concern in patients' decision for different treatment options in localized disease. Therefore, preoperative patient counseling should be one of the most important goals of the physician to reach satisfactory results in terms of quality of life. In this article, management of erectile dysfunction after treatment with curative intent in prostate cancer has been summarized and current knowledge on this topic has been reviewed.