The purpose of this study is to develop Injury Prevention Training Program for Junior Tennis Players and is to examine the efficacy of the program. In order to achieve the purposes of the current study, it has been done in 2steps; the first step was to develop Injury Prevention Training Program for Junior Tennis Players through previous studies and expert group(sports rehabilitation professor 1 person, physical education professor 2 persons, tennis coaches 3 persons and athlete trainers 2 persons) judges. As the subjects of this research, finally total 34 men and women athletes; 18 athletes who attended middle school, 16 from high school, which is located in Gyunggi-do and Seoul; Effectiveness of Injury Prevention Training Program (experimental group 17 persons and control group 17 persons) is verified. Through the processes explained above, conclusions were reached as follows; First, it is developed Injury Prevention Training Program through restructure the stages of rehabilitation programs process. Developed Program is composed of Basic Motion; Stabilization(5), Strength(5), Agility(5) and is modified motion to strengthen tennis-specific muscle. Second, developed Injury Prevention Training Program(experimental group 17 persons and control group 17persons) is conducted for 12 weeks and as a analyze results of study which is influenced by physical factor, performance factor. In summary, it is considered that tennis players experience specific core muscle exercise through Injury Prevention Training Program for Junior Tennis Players and make full use of tennis technic and also adaptable for young player who have chronic lumbar pain. In future study, It will be suggested that Injury Prevention Training Program should be developed and applied to pelvic limb(ankle, knee), the upper limbs(shoulder, wrist) of high frequency of injury.