This study aims to explore how banks evaluate investment decisions towards SMEs, through a real option approach. After analyzing 9 interviews with business advisors from four different banks, illustrations show that banks indeed use a real option way of thinking, without being aware of it as well as put more weight in certain factors namely the repayment ability. Moreover, the relationship factor shows an interesting relevance during investment evaluation towards SMEs, as better relationships lead to lower demands on factors of evaluation. In brief, the study contributes to the theory of real options as well as of practical essentiality to banks and SMEs.