On the demand side, we test how early childhood education creates preferences for Corporate Social Responsibility (CSR) through teacher-student gender randommatching. Using originally collected individual-level data, we examine how female teachers in elementary school influence students' CSR stated preferences in their adulthood. In a quasi-natural experiment setting, our major findings are: (1) female teachers affect pupils' preferences for corporate responsibility later in life, (2) the effect of a female teacher is robust if she was a class teacher in first grade, (3) the effect of a female teacher is observed only for different-gender pupils but not for same-gender ones.These findings imply that the gender gap in adulthood is reduced by matching female teachers with male students in earlier years. We examine and support the female socialization hypothesis.JEL classification: G32, G34, J16, M14, I21, H89