---

Background: Aging in men is characterized by a progressive, moderate decrease in plasma testosterone. However, the associations of partial androgen deficiency of the aging male with clinical symptoms are controversial. This study investigates the association between the androgen deficiency symptoms (based on ADAM questionnaire) and sex hormone levels in men over 40 years old. Materials and Methods: This cross-sectional study was carried out on 171 healthy men over 40 years old. Demographic data and ADAM questionnaire were completed by each patient. Also, serum levels of free testosterone, estradiol, LH, and FSH were determined using the ELISA method. The data was analyzed by Chi-squared, Mann-whitney U test and Logistic Regression Test. Results: Based on ADAM questionnaire, 85 patients (49.7%) had androgen deficiency symptoms, and there was a significant relationship between these symptoms and age. However there was no significant correlation between the total score of the questionnaire with sex hormones, and only sexual symptoms were significantly associated with low testosterone levels. Conclusion: It seems that the clinical symptoms of androgen deficiency cannot precisely predict the levels of sex hormones in elderly men. Nevertheless, hypogonadism diagnosis can be clinically suspected when symptoms of sexual dysfunction are present