Aim:To investigate whether the TNIKgene affects risperidone treatment outcomes in the Chinese population. Methods:A total of 148 unrelated inpatients who received risperidone for six weeks were enrolled. The selected single nucleotide polymorphisms (SNPs; rs2088885, rs7627954 and rs13065441) were genotyped using the MassARRAY®SNP IPLEX platform. Results:The analysis showed that one novel SNP of TNIK, rs7627954, had a significant association with the response to risperidone (χ2= 4.472; p = 0.034). This work also identified rs2088885 as significantly associated with risperidone response (χ2= 5.257; p = 0.022). The result revealed that the rs2088885–rs7627954 C-T haplotype was more prevalent in good responders than in poor responders (p = 0.0278). Conclusion:This study revealed that the rs2088885 and rs7627954 SNPs of TNIKare associated with risperidone treatment response.