Participation in community development of Muslim Thais in Tambon Cha Wai in Chai Ya district, Ang Thong province, was divided into four aspects: income supplement, promotion of savings for production, environmental development and spiritual development. The overall participation was at a moderate level. The participation was high for spiritual development while the participation in environmental development and income supplement was at a moderate level. The participation in promotion of savings for production was at a low level. It was also found that men were more involved in community development than women and age difference did not affect the participation in community development. Those involved in a farming career were more participative than those in other employment sectors. Those with secondary careers were more participatory than those without secondary careers. Education was divided into general and religious education. It was found that different levels of general education did not affect the participation, whereas those with religious education higher than level 4 participated in community development higher than other groups. Religious members were more participative than less religious ones. The problems affecting their participation included career burdens, lack of public relations, health problems, and time constraint (pp. 203-206). It could be seen that various factors affected their participation in community development. They were different from general factors because of the differences in their religions, education, culture and lifestyles.