Introduction: We aim to determine the epidemiology, clinical, paraclinical and etiologic aspects and to evaluate the management of male subfertility in urology. Methodology: We conducted a retrospective descriptive study of 137 patients referred to the urology department for male subfertility over a period of 4 years. The analyzed variables were: clinical, paraclinical characteristics and the post therapeutic evolution. Results: The mean age was 38.41 years (range: 24 to 67 years). The semen analysis was normal in 18 patients. The semen analysis showed oligoasthenozoospermia (45.3%) and total azoospermia (24.8%). Disease history was represented by: gonorrhea (27.7%), urogenital schistosomiasis (13.2%) and hernia repair (1.2%). The hormonal test showed abnormal hormone levels including : FSH (43.8%), LH (46.7%), testosterone (36.5%), prolactin (22.6%). The incriminated etiologic factors were: varicocele (5.8 %), smoking (23.7%), alcohol intake (25.4%) and sexually transmitted diseases (42.3%). The treatment was medical in 67.9% and surgical in 32.1% of cases. After a year of follow up, 13.9% of patient's wives were pregnant. Conclusion: Male subfertility is common in Chad. The causes are numerous and diverse. The treatment is etiology based. A better management of sexually transmitted diseases and urogenital schistosomiasis is the best way to prevent it.