Nowadays, intergenerational mobility and gender equality have captured widespread attention. This study aims to examine the relationship between the two to provide policy insights that benefit both polarized issues. This study reviewed the existing literature and formulated hypotheses that early childhood development has long-lasting impacts on adults' outcomes and is a decisive factor in determining social mobility in adulthood. Gender equality policies play huge roles in this period, mitigating adverse effects from childhood and providing opportunities for disadvantaged children in early childhood development. This study tests the hypotheses with multiple regression and performs sensitivity analysis with an alternative proxy. The result is that public spending on childcare, female labour market participation, and child poverty are statistically significant with social mobility, while weeks of maternity leave and poverty rates of single-earner families are not.