The research aims to study the effect of Modified FIFA 11+ program on developing some specific physical qualities and straight shot accuracy for juniors squash under 13 years, The researchers use experimental methodology with two groups design (experimental and control) and pre-post measurements, The research sample was chosen in Purposive method, 16 juniors squash registered in the Egyptian Squash Federation 2017-2018 were divided as follows (8) juniors of the experimental group, (8) juniors of the control group, The researchers add Modified FIFA 11+ program ( 10 weeks by three training units per week) as warming up for the basic program for the experimental group, the results of this study were the Modified FIFA 11+ program has a positive effect on developing some specific physical qualities and straight shot accuracy for juniors squash.