This study aims to investigate the moderating effect of organizational learning culture on the relationship between transformational leadership and affective commitment. Using the Social Exchange theory to explain the moderation effect, we argue that the relationship between transformational leadership and affective commitment is strengthened by organizational learning culture. Data were collected by administering questionnaires to the respondents using both offline and online survey on employees from two startup companies in Indonesia (<em>N</em> = 73). This study using self-report method and data were analyzed using Hayes’ PROCESS macro on SPSS software. Results showed that organizational learning culture moderated the relationship between transformational leadership and affective commitment, such that the relationship between transformational leadership and affective commitment was increased when organizational learning culture was high than when organizational learning culture was low. Theoretical and practical implications are further discussed.