Many studies shown by researchers are causes of human trafficking. There are two countries are a neighboring. There are similar and different which cause lead to human trafficking. It was found that a comparison between Sweden and Denmark, a neighboring country are similar about economic and society, but the reform law and prostitution was in the opposite direction. The regime has prohibited small prostitution, it will leads to human trafficking. (Cho, Dreher&Neumayer , 2012, p.75). Global Freedom Center (n.d.) explained that all levels of education is initiating and preparing to prevent human trafficking. The researcher shown that education is important to decrease the victims of human trafficking. The law is also important factor. Aimoncelli(2009, p.265) said that the transnational sex, caused by the economic and political. Today the sexual labor, female and femal and informal to benefit. There is also a connection all over the world to seek benefit from people of color, the working class and poor. The information support on law for protect the labor. As a regards trafficking linked to various types of force labor, especially inadequate labor law and regulation and enforcement not cause serious problems for the victims rather than good and decrease of human trafficking. (Temesgen, (n.d.), p.6) In addition, researcher in Thailand have found the cause of human trafficking is poverty and poor people are often the victims. Roujanavong(n.d.) said that silence of the poor victims. Victims do not believe in the authority, afraid of being exposed and afraid of punishment to the guilty, prostitution or being deported. Although the study on human trafficking in Thailand but it is so less. The author needs to found and confirm the real cause of human trafficking.