The research aims to effect of clash exercise on development of capability and some attack kicks for kumite juniors under14 years . The researchers used the experimental method and suitability to the type and nature of this research , through experimental design using pre- and post- per one group . The researchers selected sample in a deliberate manner from karate juniors under 16 year who have obtained a brown belt in Dakahlia Karate Zone, the sample consisted of (12) juniors from regular in application of training program, in addition to sample of exploratory studies (8) from the same research community and from outside the basic research sample . The researcher did two questionnaire studies in period from Saturday, 4/11/ 2023 to Tuesday, 14/11/ 2023in order to ensure accuracy in the results extracted from the basic study sample measurements and the calculation of the scientific tests for the tests (honesty - stability) . The researcher applied training program using clash exercise training from Saturday 18/11/2023 to Wednesday 10/1/2024, for a period of (10) weeks, and the existence of (3) training modules per week are Saturday, Monday, Wednesday of each week . and the most important results training program using clash exercise training positive impact on development of capability and some attack kicks for kumite juniors under14 years . and the most important recommendations apply training program using clash exercise training because of its effective on development of capability and some attack kicks for kumite juniors .