Introduction: IPV is a serious public health problem that is in most cases perpetrated by men against women. Interventions on IPV have focused mostly on ensuring women safety and empowerment while often neglecting the role of men as allies in ending IPV. Objectives: To explore men’s perception of perceived factors that lead to IPV against women. Method: A cross sectional descriptive study involving male participants was conducted involving 4 Focus Group Discussions and 6 In-depth interviews in Moshi Urban and Rombo districts, Tanzania. Purposeful random sampling was used in the selection of study participants. Semi-structured focus group and interview guides were used as data collection tools. Data was analyzed manually using thematic analysis framework. Results: Participants were aware of various forms of IPV and viewed it as unjustifiable. Patriarchy, alcohol abuse and women’s economic empowerment were repeatedly mentioned by participants of both the Focus Group Discussions and In-Depth Interviews as the key factors leading to IPV. Collaborative efforts among stakeholders which engaged men as agents of change were necessary to prevent IPV. Conclusion: IPV is a preventable problem that needs multi-sector collaborative efforts. Engaging men as allies in the prevention of IPV is a more effective strategy than concentrating on punitive actions against them. Intervention on prevention of IPV have to take perceptions of both sexes and have to be fair, just and should strive to achieve gender equality. Keywords: Men’s Perception, Perpetrator, Intimate Partner Violence, Tanzania