Purpose: The aim of this study was to determine the change of static and dynamic foot pressure on trunk stabilization exercise in children with spastic diplegic cerebral palsy. Methods: This study examined five male children participants ages 10~14 years old with spastic diplegic cerebral palsy. All subjects participated in a 6-week sling exercise program for trunk stabilization; the exercise was performed three times per week and each session lasted 50 minutes. The subjects were measured for static and dynamic foot pressure and bilateral symmetry of both feet before and after the trunk stabilization exercise. Results: The static foot pressure increased significantly before and after the trunk stabilization exercise (left foot: before $0.41{pm}0.02%BW/cm^2$ after $0.79{pm}0.02%BW/cm^2$, right foot: before $0.14{pm}0.03%BW/cm^2$, after $0.43{pm}0.44%BW/cm^2$) (p<0.05) and bilateral symmetry of both feet increased (before $0.27{pm}0.18%BW/cm^2$, after $0.37{pm}0.05%BW/cm^2$) with more weight shift on left foot than right foot, but was not statistically significant (p>0.05). The dynamic foot pressure increased (left foot: before $2.58{pm}0.44%BW/cm^2$, after $3.40{pm}0.31%BW/cm^2$, right foot: before $2.75{pm}0.19%BW/cm^2$, after $3.26{pm}0.18%BW/cm^2$) with more weight shift on right foot than left foot, but was not statistically significant (p>0.05), and bilateral symmetry of both feet decreased (before $0.31{pm}0.36%BW/cm^2$, after $0.13{pm}0.20%BW/cm^2$) (p<0.05). Conclusion: The findings of this study indicated that the trunk stabilization exercise has a positive impact on static and dynamic foot pressure in children with spastic diplegic cerebral palsy.