The purpose of this study was to clarify developmental changes of self-disgust during adolescence. One hundred and twenty-three adolescents described their experiences of self-disgust, and a self-disgust rating form was constructed from the contents of their responses. A sample of eight hundred and sixty-nine adolescents completed this form; the adolescents included junior and senior high school students, and college students. The results were analysed by means of procrustes factor analysis. The main results of the second-order factor analysis conducted among the three different age groups were as follows: 1) Among junior high school students self -disgust seemed to be understood as one factor; 2) Among senior hi gh school students self-disgust was made of two factors: self-disgust to oneself and self-disgust regarding others; 3) Among college students, self-disgust was understood as three factors: lack of self-confidence, difficulty of self-control, and insufficient self-understanding.