This study was carried out to identify the relationships of suicidal ideation, depression, spiritual well-being of adolescence in Korea. Design of the study was correlational study. Objects of the study were 423 adolescences of high school students of 5 cities in Korea, Data was collected from April, 2003 to July, 2003 using structured questionnaire. Research tools of this study were SSI(scale for suicidal ideation) developed by Beck(1979), BDI(Beck depression inventory) translated by Lee(1993), scale for spiritual well-being of Paloutzian & Ellison translated by Choi(1990) Collected data were analyzed by frequency, percentage, mean, standard deviation, t-test, ANOVA, Pearson`s correlational coefficients with SPSS/PC 11.0 program. The results of the study were as follow : 1. Mean value of suicidal ideation(25.93) of adolescences were moderate level, depression(12.48) was low, spiritual wll-being(75.35) was high. 2. Relationships of the suicidal ideation, depression, spiritual well-being of adolescence. Suicidal ideation of adolescence was positive relationships with depression(r=.628, p= .000), suicidal ideation of adolescence was negative relationships with spiritual well-being(r=-.329, p= .000). In conclusion, it was found that depression of adolescence was incline to increase suicidal ideation, spiritual well-being to decrease suicidal ideation of adolescence. Therefore, development of counseling and guidance program to increase spiritual well-being of the adolescence was suggested.