Since its emergence in early 1980's, HIV/AIDS remains a global health problem of unmatched dimensions. It has caused millions of death globally and has led to deep demographic changes mainly in most heavily affected countries. Voluntary HIV counselling and testing (VCT) is one of the key strategies in the HIV/AIDS prevention and control programs. However, utilization of these services has been reported to be low mainly among adult men even though they are yet the key decision makers both at home, at the workplace, in the parliament as well as at religious institutions. The book presents the prevalence and factors associated with voluntary HIV counselling and testing services utilization among adult men (aged 15-59 years) in Ethiopia. This book can be interesting for health professionals, concerned government bodies, HIV/AIDS prevention activists as well students.