Purpose This study was to investigate the effects of headcentered gross motor training on balance, trunk sway, gait and gross motor functions of children with spastic diplegia. Methods The experimental group (n=10) participated in headcentered gross motor training program (30 minute per session and 2 sessions per week), while the control group (n=10) received regular physical therapy (30 minute per session and 2 sessions per week). Changes in static balance ability, gait ability, and gross motor functions were measured pre and post intervention to determine the effect of the intervention. Results The experimental group showed a significant difference in terms of trunk sway during static gait after the intervention. In the gait function test, the experimental group showed a significant difference only in singlesupport phase, while the control group showed a significant difference only in step width. In the gross motor function measure (GMFM), the experimental group showed significant differences in the mean of C, D, E and total whereas the control group showed significant differences in the mean of D, E and total. In the betweengroups comparison, a significant difference in only mean of E was found in the gross motor function measure. Conclusion Based on these findings, it was determined that headcentered gross motor training improves static balance, trunk control, and postural stability during gait, and gross motor functions in children with spastic diplegia. Improved postural stability through such headcentered gross motor training could be helpful in improving balance and postural control.