Intellectual impairment is one of the most common mental disorders associated with impaired balance and impaired motor performance. The aim of this study was to investigate the effectiveness of game-based intervention on postural control and motor performance in children with intellectual impairment. The population of this study was all of the intellectual impaired girls of Tehran and Mashhad City, and sample consisted of 20 educable intellectual impaired girls, who were healthy physically and voluntarily participated in this research. The subjects were randomly divided into two equal experimental and control groups (n=10). The experimental groups had six weeks of game-based intervention with two sessions per week. During this period, the control group control group engaged in the routine activities of the physical education class. The Timed Up and GO and Stork tests were done as pre-posttest, respectively. Data were analyzed through descriptive and analysis of independent T-test. The findings showed that the implementation of the six-week exercise program led to improvements in static balance (P=0.001) and motor performance (P=0.001) of the participants in the game group compared to the control group. The findings of the study underline the importance of early, structured interventions for children with mild intellectual disabilities, particularly those based on game. Such interventions not only improve motor performance and balance but also contribute to overall physical, cognitive, and social development. Given the positive impact of game-based interventions, they should be integrated into rehabilitation and educational programs for children with intellectual disabilities to support their development and improve their quality of life.