Although there have been increasing interests in microfinance institutions (MFIs), different behaviors of MFIs have not been well explored. Particularly, there are few empirical studies that explore MFIs’ outreach for the poor. This is a concern in the literature because helping the poor to overcome poverty through financial services is a major goal of MFIs. Based on the institutional logics perspective, this study fills the gap by examining how MFIs’ institutional logics are related to outreach of their services for the poor. Also, unlike previous studies that focus on direct effects of formal institutions on MFIs’ outreach for the poor, this article explores the interaction effect of formal institutions and institutional logics on the outreach.