The Thai government has launched a policy on the community economy development for local community enterprises. Unfortunately, a majority of community enterprise groups were not successful due to the members’ lack of participation in managerial administration. Therefore, this research emphasizes the participatory and rationale factors affecting the participation of Chiwavitee Community members in Nam Kian Sub-district, Phu Phiang District, Nan Province in 4 aspects, namely: decision making, implementation, benefit sharing, and evaluation. Questionnaires were employed for data collection from 256 community enterprise’s members. The obtained data were analyzed by using descriptive and inferential statistics. The results revealed that, almost two-third (64.50%) of groups’ members were female, with an average age of 44.05, graduated at the vocational certificate and advanced vocational certificate level (34.00%). The members engaged in agriculture and general employment (35.90%, and 35.20% respectively). More than one-half (54.70%) of the members received marketing information of community enterprises. They had moderately high level of attachment among members, and participation of activities with other groups or organizations ( ?? = 4.49, and ?? = 4.49 respectively). As a whole, they had moderately high level ( ?? = 3.87) of business operational success, as well as had high level ( ?? = 4.53) of participation in managerial administration. Moreover, the study found 7 main rationale factors affecting participation in managerial administration of members which were gender, age, educational attainment, occupation, receiving informational of marketing in community enterprise management, attachment among members, and participation of activities with other groups or organizations.