The purpose of this study is to identify the factors that affect the participation of the adult with developmental disabilities in lifelong education. Also, based on the results, it is to derive ways to increase participation in lifelong education. The subjects of this study were 427 adults with developmental disabilities aged 30 to under 65. The analytical methods were analyzed by frequency analysis, ² verification, and logistic regression. The results of the study were as follows: First, there were differences in participation in lifelong education according to gender, education, type of caregiver, place of residence, and employment. Second, age, education level, disease status, and ADL were factors that contributed to lifelong education participation. In other words, younger age, higher education level, no disease and higher ADL level was the higher participation in lifelong education. On the basis of these results, this study proposed the some strategies to increase participation in lifelong education for adults with developmental disabilities.