The purpose of this study was to understand what influence Perceived Freedom of Participation of Mountaineering has on Self-Actualization and Psychological Well-being. The instrument for data collection was a questionnaire in which Perceived Freedom Scale as identified by Witt & Ellis(1987), translated by Won(1989), Self-Actualization Scale as identified by Shostrom(1963), translated by Seol(1995), Psychological Well-being Scale as identified by Ryff(1989), translated by Kim(2001). 400 subjects were selected from the adolescents participation of mountaineering in the gyungki by the stratified cluster sampling method. Among these selected subjects, 373 responded, and data analyses consisted of employing frequency analysis, factor analysis, one-way ANOVA, Multiple correlation, Multiple Regression Analysis using SPSS/PC+ version 15.0. The following results were obtained: First, It was found that perceived freedom of participation of mountaineering has an influence on self-actualization. Second, It was found that perceived freedom of participation of mountaineering has an influence on psychological well-being. Third, It was found that self-actualization of participation of mountaineering has an influence on psychological well-being.