We study the causal effects of a labor law that governs child workers on labor market outcomes and the well-being of individuals. We exploit the timing of the national legislation to identify the causal effects of child labor reform using the Regression Discontinuity Design. We find that individuals who entered adulthood after the reform are less likely to have participated in the labor market during childhood. The reform also lowers the likelihood of poor health and improves the probability of working in paid jobs when children have reached adulthood. Our heterogeneity analysis highlights the importance of complementing regulation with enforcement and support programs to minimize unintended consequences that plagued many similar reforms.