Abstract: objective 2+- Toinvestigatethecorrelationbetween geneticpolymorphismofplasmamembraneCa ATPaseisoform2 PMCA2 - Methods ( )andsusceptibilitytonoise inducedhearingloss(NIHL). Atotalof228workerswithNIHLwereselectedas the case group by simple random sampling method,and 230 normal hearing workers with similar age,length and level of noise exposure were selected as the control group.DNA was extracted from peripheral blood of workers of the two groups,and single PMCA2 Results nucleotidepolymorphism (SNP)of wasgenotypedbyMassArraysystem. Theallelefrequenciesofrs1719571 PMCA2 - P and rs14154 of gene in the control population were consistent with Hardy Weinberg equilibrium (both >0.05). There was no significant difference in the distribution of rs1719571 and rs14154 genotypes and allele frequencies between the two P groups(all >0.05).LogisticregressionanalysisshowedthattheriskofNIHLinGAgenotypeofrs1719571waslowerthanthat-P in GG genotype (odds ratio=0.53, 95% confidence interval=0.31 0.90, <0.05), after excluding the effects of age, length of exposure to noise, intensity of exposure to noise, smoking and alcohol consumption. The genotype of SNP rs14154 might not P Conclusion PMCA2 contribute to the genetic susceptibility of NIHL( >0.05). The SNP of rs1719571 is associated with the susceptibilityofNIHL,andGAgenotypemaybeapotentialprotectivefactorforNIHL.