|The purpose of the study is to examine the effects of adult Learner`s self-concept, participation motivation, and degree of participation in learning on lifelong learning outcomes. The participants of the study were 417 adult learners(male 56, female 361) aged over twenty years-old from the lifelong learning institutes located in Daejeon Metropolitan city. Basic statistical data including frequency, mean, SD, and correlations among 13 subordinate variables were computed using SPSS19.0, and a structural analysis was performed using AMOS 19.0 program. The main findings of the study were as follows : First, results of model fitness showed that the hypothetical model generally fit into empirical data(χ²=146.76(p<.001, df=38), TLI=.912, CFI=.932, SRMR=.03, RMSEA=.079. Second, total effect of participation motivation, degree of participation in learning, and self-concept on lifelong learning outcomes was .67, .45, and .36, respectively. It was concluded that a variety of program for improving participation motivation and the extent of learning participation should be developed and implemented, for enhancing participation in lifelong learning and maximizing lifelong learning outcomes.