BACKGROUND: Previous studies on the effect of eradication on functional dyspepsia (FD) are conflicting. We performed a comprehensive meta-analysis on this issue according to region and prevalence of . METHODS: Randomized controlled trials (RCTs) evaluating the effect of eradication of on functional dyspepsia up to December 2018 were searched through PubMed, EMBASE, and the Cochrane Library. Subgroup analyses by the outcome measure, region, and prevalence of were performed. All data were analyzed with Review Manager 5.3. RESULTS: Eighteen RCTs were included in our meta-analysis. Overall, the eradication group showed significant improvement of symptoms compared with the control group (risk ratio (RR) = 1.18; 95% confidence interval (CI): 1.07-1.30, < 0.01). There was moderate heterogeneity among studies ( = 34%) and the number needed to treat (NNT) was 15.0. eradication improved dyspeptic symptoms both in low (<50%) and high (≥50%) prevalence regions (RR = 1.21 and 1.17; 95% CI: 1.02-1.44 and 1.06-1.29, = 49% and 5%, respectively.) In the analysis of studies from Asia, however, the effect of eradication on improvement of dyspepsia was not significant (RR = 1.14; 95% CI: 0.99-1.33, = 0.08, = 37%). CONCLUSION: Overall, eradication provides significant improvement of symptoms in functional dyspepsia patients regardless of prevalence. However, in the analysis of studies from Asia, the eradication did not significantly improve dyspeptic symptoms. In this region, eradication for dyspepsia can be individualized.