Background:　The　co-existence　of　allergic　rhinitis　(AR)　and　obstructive　sleep　apnea　(OSA)　is　a　common　phenomenon　in　clinical　practice.　AR　has　long　been　considered　a　risk　factor　for　OSA.　However,　the　relationship　is　not　completely　clear.　Therefore,　we　conducted　a　meta-analysis　to　evaluate　the　prevalence　of　AR　in　sleep-disordered　breathing　(SDB)　/OSA　and　their　relationship.　Methods:　A　comprehensive　literature　search　was　performed　in　PubMed/Medline,　Google　Scholar,　Wiley　Online　Library,　EMBASE,　and　Web　of　Science.　Data　were　analyzed　and　pooled　to　estimate　effect　size　(ES)　/odds　ratio　(OR)　with　95%　confidence　intervals　(95%　CI).　Heterogeneity　was　quantified　and　evaluated　by　chi-squared-based　Q-test　and　12　test,　with　P　＜.05　and　Ir　＞　50%　indicating　evidence　of　heterogeneity.　Results:　44　studies　contained　6086　participants　were　included　in　this　meta-analysis.　For　adults,　the　prevalence　of　AR　was　22.8　(95%　CI,　15.0-30.6)　%　in　SDB　and　35.2　(95%　CI,　25.6-44.7)　%　in　OSA.　In　children　with　SDB　and　OSA,　the　prevalence　of　AR　was　/10.8　(95%　CI,　24.3-57.2)　%,　and　45.2　(95%　Cl.　25A-65.0)　%　respectively.　The　odds　ratios　of　prevalence　of　the　SDB　pediatric　patients　with　AR　was　2.12　(959/0CI,　1.75,　2.57;　P　＜.0001)　times　higher　than　that　of　non-SDB　pediatric　patients.　There　were　no　significant　differences　between　OSA　adults　with　or　without　AR　in　BMI　(Body　Mass　Index),　neck　circumference,　apnea　hypopnea　index　(AHI)　and　epworth　sleep　scale　score　(ESS).　Conclusion:　The　prevalence　of　AR　in　OSA/SDB　is　considerably　high　and　children　with　SDB　suffering　from　a　higher　incidence　of　AR　than　non-SDB.　OSA　adults　accompanied　with　AR　do　not　have　any　influences　on　sleep　parameters.