Background: Stroke-related trunk muscle weakness impairs balance and sitto- stand performance. Although trunk kinesio taping has shown potential to improve trunk control, evidence regarding the immediate effects of simple and clinically applicable taping methods on sit-to-stand function remains limited. Objectives: The purpose of this study was to investigate the immediate effects of spiral trunk taping on sit-to-stand in stroke patients with trunk control disorders. Design: Randomized controlled trials. Methods: Twenty-four stroke patients were divided into an experimental group (n=12) and a control group (n=12). The experimental group received spiral trunk taping, whereas the control group received sham taping. Dynamic balance performance (sit-to-stand and Timed Up and Go) was assessed immediately after the intervention. Results: The experimental group demonstrated significant improvements in dynamic balance, with reduced completion times in both the sit-to-stand and Timed Up and Go following the intervention, whereas no significant changes were observed in the control group. Moreover, the magnitude of pre–post change in all dynamic balance variables was significantly greater in the experimental group compared to the control group. Conclusion: Spiral trunk taping significantly improved sit-to-stand and Timed Up and Go in stroke patients, suggesting that a trunk-centered taping approach may be an effective and clinically feasible intervention to enhance functional movement and dynamic balance after stroke.