Countless meta-analytic studies document the relation between parental involvement and achievement, but they mostly include studies conducted in the United States where parental involvement is framed as a policy issue. This is the first meta-analytic study focusing on East Asian countries characterized by high achievement levels, a comparatively standardized education system, and no policy encouraging family--school relations. A meta-analysis of 15 studies retrieved from an exhaustive search of the literature reveals a positive association between parental involvement and achievement. The strength of the relation was highest for academic socialization, followed by home involvement and school involvement, similar to previous meta-analyses.