Background. Extragastric manifestations ofHelicobacter pylori(H. pylori) infection have been reported in many diseases. However, there are still controversies about whetherH. pyloriinfection is associated with diabetes mellitus (DM). This study was aimed at answering the question.Methods. A systematic search of the literature from January 1996 to January 2016 was conducted in PubMed, Embase databases, Cochrane Library, Google Scholar, Wanfang Data, China national knowledge database, and SinoMed. Published studies reportingH. pyloriinfection in both DM and non-DM individuals were recruited.Results. 79 studies with 57,397 individuals were included in this meta-analysis. The prevalence ofH. pyloriinfection in DM group (54.9%) was significantly higher than that (47.5%) in non-DM group (OR = 1.69,P<0.001). The difference was significant in comparison between type 2 DM group and non-DM group (OR = 2.05), but not in that between type 1 DM group and non-DM group (OR = 1.23, 95% CI: 0.77–1.96,P=0.38).Conclusion. Our meta-analysis suggested that there is significantly higher prevalence ofH. pyloriinfection in DM patients as compared to non-DM individuals. And the difference is associated with type 2 DM but not type 1 DM.