This paper presents the first evidence of the causal relationship between adult children’s schooling and changes in parental health in the short and long term. By using supply-side variation in schooling as an instrument for adult children’s education and a representative dataset for rural China, we find that adult children’ education has a positive influence on the long-term changes in parental health, with limited evidence of any short-term effect. Our results remain consistent after a variety of sensitivity tests. The heterogeneous analyses show differences in socio-economic status and gender, with low-educated parents and mothers being the primary beneficiaries of children’s schooling. Potential mechanisms for the long-term effects of adult children’s education on changes in parental health include better chronic disease management, improved access to health, sanitation, and clean fuel facilities, improved psychological well-being, and reduced smoking behaviours.