The present study was conducted to determine the effect of core stability exercises on the jump-landing pattern and balance of female students with trunk defects.In this quasi-experimental study,30 girls with trunk defects were selected and randomly assigned to two control groups (age:13.40±0.73 years, height:1.69±0.05 m, weight:59.46±6.94 kg) and training groups (age:13.20±0.86 years, height:1.67±0.04 m, weight:56.60± 8.05 kg).In this study,individuals with dynamic valgus knee defects were identified using the Tack Jump test.Before and after the training period, static and dynamic balance variables and jump-landing pattern were measured using the BESS, Y,and LESS tests, respectively.The subjects in the training group performed the exercises for 6 weeks, and the control group also performed their exercises during this period.Also, for the inferential analysis of data and expression of possible differences between the means of the groups in different stages of the research, the statistical methods of analysis of covariance, paired t-test, Mann-Whitney U and Wilcoxon were used (P≥0.05). The results of the study showed that the training program had a significant effect on improving the jump-landing pattern(p=0.001), static balance (p=0.001) and the total score of dynamic balance (p=0.001).Also, the results of the comparison of the groups in the variables under study indicated a significant difference between the two groups(p≥0.01). The results of this study have shown the significant effect of applying 6 weeks of central stability exercises on improving the jump-landing pattern, static and dynamic balance of female students, and based on this, this program is suggested to teachers and students to improve performance.