Objectives: Sexual functions of men and women interact with each other. Therefore any problem or improvement in the sexual activity of one of the couple will effect the other. In recent years low dose of tadalafil (5 mg) has been used for both relieving lower urinary tract symptoms and improving sexual functions. In this study we aimed to see whether sexual functions of women will improve upon the improvement of their partners’ sexual functions after using daily 5 mg tadalafil for 3 months. Methods: Sexually active partners of men using 5 mg daily tadalafil, aged between 20-60 years were included in this study. All men with lower urinary tract symptoms filled up IIEF-5 form before the treatment and again after 3 months medication. All their female partners filled up FSFI form at the first control visit after 3 months medication. The partners concomitantly filled up the same form (FSFI) according to the situation before 3 months (before medication). Results: There was significantly increase in the IIEF-5 score of men (p0.05). Also there was no significant correlation between the age of men and the improvement of FSFI score (p>0.05). Conclusions: Sexual partner satisfaction is an important issue in men’s sexual life. It must be investigated and should be paid attention by the physician while conducting the medication.