Here, we report preliminary results of TAEST16001 cells from an ongoing, dose-escalation and expansion study in HLA-A*02:01 positive patients with advanced soft tissue sarcoma expressing NY-ESO-1 antigen. Among 12 efficacy-evaluable patients, 5 patients had a partial response, 5 patients had stable disease, and 2 patients had progressive disease. The overall response rate was 41.7%. The median time to an initial response was 1.9 month (range, 0.9 to 3.0), and the median duration of response was 14.1 months (range, 5.0 to 14.2).