The purpose of this study was to analyze stress factors of high school students participating in physical education classes and provide plans to reduce their stress by examining differences in the level of stress by the type of school, dwelling area, grade, and gender. Three questionnaires were administered to male and female high school students living in Kyong Nam Province. In the first questionnaire, 565 students out of 10 schools participated as subjects. In the second and third questionnaires, 1,137 students out of 20 schools and 597 students out of 10 schools participated as subjects respectively. Results of the questionnaire were analyzed by factor analysis and ANOVA. Results of the analyses were as the following: 1. From the original 96 question, 30 were identified as valid items, and classified into six stress factors. The levels of stress on the six factors were found to be in the order of the burden of examination, the lack of self-confidence, the content of class, facility and environmental conditions, complaints about teachers, and conflicts between friends. 2. The level of stress students felt in physical education classes was shown to differ by the type of school, dwelling area, and gender. In terms of the difference between the type of school, vocational high school students were found to feel more stress than academic high school students in every stress factor except the burden of examination, In terms of the dwelling area, students living in urban area were shown to feel more stress than those in rural area in every stress factor except the conflicts between friends. With regard to the difference between gender, female students were found to feel more stress than male students in every stress factor except the facility and environmental conditions. 3. Responses of students to the expected contribution of each stress factor to the reduction in stress were different from their responses to those factors as the cause of stress. The expected levels of reduction in stress by each factor were shown to be in the order of facility and environmental conditions, complaints about teachers, the burden of examination, conflicts between friends, the lack of self-confidence, and the content of class. The expected level of each factor for the reduction of stress was found to differ by the type of school, dwelling area, grade, and gender.