Purpose: This study aims to prepare academic foundations and evidence for judo and explore changes in judo technique use according to middle school, high school, and college judo athletes winning experience and experi-ence of being selected as representative athletes. Method: In order to achieve the purpose of this study, frequency analysis was conducted to identify the gen-eral characteristics of the study subjects, and Cronbach s α coefficient was calculated to obtain the reliability value of the survey. In addition, t-test and One Way ANOVA were conducted to find out the difference in defense techniques according to the player s gender and grade. Results: As a result of the study, there was no difference in gender in judo defense techniques, and there was a significant difference in hand technique, hip technique, foot technique, and defense technique according to the player s grade. Conclusion: As a result of this study, considering the difference in judo defense technique according to grade, hand technique and hip technique are evenly distributed in grade, and in the case of foot technique, the higher the grade, the difference in perception of defense technique appeared.