In the present study, the structure of self-consciousness as an index of psychological health in adolescence was examined. At first, items were gathered using data from clinical case studies on adolescents in order to develop a questionnaire apparatus. It consisted of four subscales which were categorized in terms of two axes (toward others-toward self and healthy-unhealthy). The questionnaire was subsequently administered to 537 high school students and 386 undergraduate students. The result of a two-step hierachical principal component method (principal component analysis -oblique promax rotation) showed three primary components at each subscale and two higher components. The two secondary components were named “sense of self -establishment” and “sense of self-diffusion,” and these components were considered as an index of psychological health in adolescence.