Abstract： Objective: We aimed to study the influence of neoadjuvant chemotherapy on immunity function in elderly patients with the stages of Ⅱ and Ⅲ esophageal cancer. Methods: Thirty-seven elderly patients (age ranged from 60 to 75 years) with the stages of Ⅱ and Ⅲ esophageal cancer underwent 2 cycles chemotherapy preoperatively with single-drug regimen (docetaxel, 35 mg/m2 once a week, on days 1, 8 and 15, at interval of 2 weeks for one cycle). Surgery were performed three weeks later. Blood samples were drawn separately on the day of admission, 1 day before operation, 7 day and 1 month after operation, and we conducted the Flow Cytometry to detect the levels of CD3+, CD4+, CD8+,CD4+/CD8+ and NK cells. Re-sults: There were no significant differences in the levels of CD3+, CD4+, CD8+, CD4+/CD8+ and NK cells between before and after chemotherapy (P > 0.05). On day 7 after operation, the levels of CD3+, CD4+, CD4+/CD8+ and NK cells were degraded and CD8+ increased significantly (P < 0.05). One month after operation, the levels of CD3, CD4+, CD4+/CD8 and NK cells were higher than normal, and CD8 was depressed significantly (P < 0.05). Conclusion: Neoadjuvant chemotherapy has no significant impact on cellular immune function in elderly patients with the stages of II and III esophageal cancer, it is an effective and safe treatment.