Objective To evaluate the correlation between mycoplasma genitalium and HIV infection. Methods Databases including MEDLINE, ScienceDirect, EMbase, WanFang Data, and CNKI were searched from inception to March 2012, so as to identify the independent cohort studies, case-control studies and cross-sectional studies. Moreover, the references of relevant studies were also retrieved. According to the inclusion and exclusion criteria, the studies were screened, the data were extracted, and the methodological quality of the included studies was assessed. Then meta-analysis was performed using RevMan 4.2 and SAS 9.1.3 softwares. Results A total of 19 studies were included, including 3 430 HIV infected patients and 7 656 controlled participants. The results of meta-analyses showed that the HIV infection group was more likely to infect mycoplasma genitalium than the control group (OR=2.34, 95%CI 1.68 to 3.28, Plt;0.000 01). The same results were found in both subgroup and sensitivity analyses. Conclusion Mycoplasma genitaliuman infection is closely related to HIV infection. However, detailed pathogenesis is still unknown. Due to the limited quality and quantity of the included studies, more high-quality studies are needed to prove the above.