This study was to identify and clarify the relationship between perceived health, self-esteem, and self-care agencies for promoting self care among Korean adolescents. Method: Data were collected from 817 adolescents in schools located in Seoul, Kyungki-do, and Chuncheon from Sept, 16th to Sept, 28th, 1999, and from Mar 10th to Mar 25th, 2000. The instruments used for this study were the Health Self-Rating Scale, Self-Care Agency Assessment Questionnaire (Denyes, 1981), the Self-Esteem Questionnaire (Rosenberg, 1971). Result: 1) The mean perceived health status among Korean adolescents was 8.75 (SD=1.72) 2) The mean self-esteem was 27.27 (SD=4.64). 3) The mean self-care agency was 99.64 (SD=21.02) and the average self-care agency score was 3.99 (SD=0.84). In the subcategories, the highest degree was feelings towards health (4.15), followed by ego strength (4.06), attending to health (3.87), general health knowledge (3.56), and the lowest degree was specific health knowledge (3.20) 4) There was statistical significant differences between demographic factors and self-care agencies, expecially, gender (t=28.65), grade (F=3.79), pocket money (t=5.72), and height (F=9.82) 5) The statistical relationship between perceived health status, self-esteem, and self-care agencies were found to have a positive correlation. 6) Self-care agencies among adolescents was the highest factor predicting self-esteem (15%). Conclusion: The relationship between perceived health status, self-esteem, and self-care agencies revealed a significant positive correlation among adolescents. Therefore, nursing intervention for adolescents needs to develop self-esteem programs to increase self-care agencies