[Purpose] This study aimed to examine the effects of mental practice on the balance abilities of normal individuals. [Subjects and Methods] Thirty subjects were randomly assigned to an experimental or control group (n=15 each). Participants in both groups performed balance training in a seated position on a gym ball for 20 minutes per session, five sessions per week, for 4 weeks. Members of the experimental group also performed mental practice for 10 minutes before the balance training. After the intervention, balance measuring equipment (Good Balance, Metitur, Finland) was used to quantitatively measure balance ability. [Results] Significant post-training gains were observed in the mediolateral, index of balance function, and time variables of participants of the experimental group. [Conclusion] The application of mental practice with balance training positively affected balance ability.