As a follow-up study to a cross-sectional national study that established the linkage between gender as well as family factors and the likelihood of being Taiwanese adolescent readers, this study attempted to utilize the same data set with longitudinal data to explore whether the association between family factors and being an avid adolescent readers differs between male and female adolescents. The results of the study suggest that unlike their female counterparts, higher parental educational level, richer family cultural environment, and better parental reading modeling might not be as relevant to male adolescents' likelihood of being avid readers: they need support from parent-child literacy interactions along the way as they grow up.