Community-based tourism development is an important base in developing Thailand’s tourism to be strong and sustainable, because the country’s tourism still has to depend on vaious community resources in propelling the economy, as evidenced from the 2nd National Tourism Development Plan under the vision of “Thailand is a leading quality tourism destination of the world which grows equitably on the basis of Thainess so as to promote economic and social development and sustainably distribute income to people in all sectors” including the linkage of mainstream tourism wih community-based tourism to create income distribution in every sector. Preparation of readiness for community residents to have guidelines in managing community-based tourism from existing authentic resources and with pride in authenticity of their own community, leading to economic values created for the community, is thus essentially important. Therefore, this edition of Criteria for Thailand’s Community-Based Tourism Development has been created as the tool for community-based tourism development with unity, through the participatory process of development and design by all sectors, with Designated Areas for Sustainable Tourism Administration (Public Organization) or DASTA as the coordinating agency to create idea mobilization, analyses, intensive trials and improvemets, opening to opinions from network partners in each sector, comprising academics in tourism development, community development, representatives of communities, local administrations and experts in tourism marketing. The National Tourism Policy Committee which is the main mechanism supervising Thailand’s tourism development with the national tourism plan, reckons the importance of community-based tourism development, and focuses on pushing community-based tourism policy under the guidelines of development towards sustainability through this manual. The objective is for communities or agencies aspiring to develop community – based tourism to make use as a tool in development planning and measuring their development levels through participatory process which is essential for sustainability and a secure basis of Thailand’s tourism development.