Objective : The purpose of this study is to investigate the effect of mental practice on increasing balance and fall index & fall efficacy scale of persons with post stroke. Method : As a single subject research design with multiple baseline across individuals, the patients were four stroke patients, employed in this study. The employed program included receiving mental practice, and measuring balance score changes using FRT for 4 weeks, including baseline and intervention periods. The subject`s fall danger were measured by Fall Index Test(Tetrax) and Fall Efficacy Scale for balance ability were analyzed. The analyses were performed using visually and Two Standard Deviation Band Method. Result : Using FRT, the participants improved their standing balance. During the intervention periods, Their improvement of balance skills results in decreasing Fall Index increasing Fall Efficacy. Conclusion : As a result of this study, mental practice can be an effective method to improve the balance of stroke patien