Objective:We aimed to investigate whether nap is associated with an increased risk of hypertension through a comprehensive meta-analysis.Methods: Literature retrieval, research selection and data extraction were done independently and in duplicate. Effect-size estimates are expressed as risk ratio (RR) and 95％ confidence interval (CI).Results:Summary data from 13 articles, involving a total of 119501 adults, were meta-analyzed. The overall analysis showed that in the included articles, when the factors were not adjusted, there was a significant association between nap and hypertension (RR=1.11,95％CI:1.02 to 1.21, P=0.013). After adjusting the possible confounding factors, nap was still correlated with hypertension (RR=1.07, 95％ CI: 1.01 to 1.14, P= 0.041). In the subgroup analysis, there was a significant association between nap and hypertension in women (RR=1.13, 95％ CI: 1.04 to 1.22, P=0.004), but this relationship was not recurred in men. And there was a significant association between nap and hypertension in people 45 years old (RR=1.16,95％CI:1.08 to 1.24, P < 0.001). In the dose analysis, it was found that there was a significant association between high blood pressure and the population with nap duration 90 minutes (RR=1.13, 95％ CI: 1.01 to 1.27, P= 0.04). Conclusion: Our meta-analysis results show that nap is a risk factor for hypertension, which is more obvious in women, and the difference is statistically significant. In the elderly people, nap is a protective factor for hypertension.