"...While there are many prior studies to date on the internal conflicts in Burma, these are mostly focused on the human rights situation within the country. In addition, many previous marked studies, such as works from Thai academics, International Organizations or the World Health Organization, have highlighted the human securities of migrant workers in the destination country whereby the process of migration has already taken place. However, none of them have focused on the phenomenon of migration in relation to perceptions of borders and human security. The lack of study addressing the influence of borders and human securities as the key indicators to people's migration behaviour supports the significance and relevance of this research...This research aims to understand the differences in the perceptions of borders between the Thai government, Shan migrant workers, Thai employers, and informal brokers, which perpetuate the flow of illegal migration. Due to the increasing number of illegal Shan migrant workers who are living, producing and consuming products and services in Thailand, or in other words, being absorbed into and continuing to contribute to the Thai economy, it is necessary to map out a framework of borders, human migration and human security for policy-makers to approach and use in addressing the migration issue as a basis for future theoretical development. A focus on the different perceptions of borders in the migration phenomenon may lead toward a more comprehensive view of the international migration process, particularly for ASEAN to have more realistic border and migration policies. Based on the purpose of the research mentioned above, my hypothesis is as follows: "The flow of illegal migrant workers is continuing and increasing due to the differences in the perceptions and functions of borders between the Thai government, Shan migrant workers, Thai employers and informal brokers". The actual primary data is derived from fieldwork conducted both in Thailand and Burma. In addition, secondary data collected from available literature was processed and reviewed in order to support the borders approach in addressing human security and migration. Finally, a comparative case study of Cambodian migrant workers is examined based on fieldwork made in the Rayong province of Thailand..."