[Purpose] The purpose of this study was to investigate the effect of dual chest banding using elastic bands on the shoulder pain of a scapular dyskinesis patient with winging and an elevated scapula. [Subject] The subject was a 40-year-old male scapular dyskinesis patient with winging, an elevated scapula, and shoulder pain. [Methods] This study developed a method of dual chest banding using elastic bands, and the subject applied this method for 1 month [Results] After applying dual chest banding for one month, the scapular position and scapular winging were improved when compared to the initial conditions. The upper trapezius pressure pain threshold was increased. [Conclusion] The present study suggests that dual chest banding provides a mechanical effect and increases proprioception and therefore reduces abnormal scapular mobility. The present study suggests that dual chest banding using elastic bands could be applied to patients with scapular dyskinesis in the clinic.