Abstract
Based on the questionnaire survey to the residents, this study has investigated the factors which could evaluate values of the art project; " ECHIGO-TSUMARI Art triennial " held as a extensive public project. It has been made clear that the factors, such as the positive feeling to the art work, the extend and the form of residents commitment, and the extend of trust in the community, affect the indexes; the striking up the acquaintances, the intensity of their interest in the festival, the positive change in the community, and the change of their impression to the festival caused by the placement of art works. Consequently, we have presented the effectiveness of the community development by art, which had little been examined using the quantitative evaluation, and the way to improve that effectiveness.