The researcher presents the two levels of plural society: a Muslim community and a border market town community levels in Mae Sod district in which include the people with various ethnicity and various religions. The researcher also points out significant factors to maintain the plural society which are socio-economic interaction and common value of the group members. Moreover, the researcher also describes the economic life and the idea of the small business owner which is Muslim identity. It also describes physical and ritual identity, religious practices and Muslim symbolic system of ethnicity as well as the interrelationship between plural society, economic life and ethnicity of the Muslim community in the market town at the Thai-Burma border.