This paper uses individual-level data from the China Health and Nutrition Survey and examines the impact of the one-child policy on gender equality in education in China. The results showed children in one-child households enjoyed significantly improved opportunities for education compared to children inside multiple-child households. The improvement for girls was larger than that of boys. In addition, we found no difference in years of schooling between only-child boys and only-child girls, whereas the gap between boys and girls inside multiplechild households remained significant. In particular, years of schooling for girls having male sibling(s) were 0.62 years lower than that of girls having female sibling(s). These findings suggest the one-child policy inadvertently contributed to greater educational gender equality in China.