The current study investigated child sex tourism offences in Southeast Asia by Korean men. Believed to be one of the unexpected consequences of globalization, child sex tourism refers to the sexual exploitation of children by travellers. The exact number of victims of chid sex tourism is not known, however, UNICEF estimates approximately 2 million children around the world and 100,000 children in Southeast Asia are victimized by child sex tourism. To combat against sexual exploitation of children, UNODC, UNICEF, WTO, and in ternational NGOs including ECPAT and APPLE call for each country’s raising\ awareness of this issue, enacting relevant law, and punishing child sex tourists. Since 2000, Korean men has been pointed out as one of the major customers of child sex tourism in Southeast Asia. Furthermore, Korean government has been criticized by international communities and NGOs since it has not taken active measures in controlling child sex tourism in Southeast Asia. In spite of the existing law, which enables punishing the child sex tourists, to this point, any Korean child sex tourists have not faced prison terms. Accordingly, the present study was conducted to examine the current situation of child sex tourism especially in Southeast Asia, barriers to enforcing the law, legal issue of child sex tourism, causes of child sex tourism, and responses of international communities, each countries, NGOs and Korea. In addition, the public survey on sex tourism and child sex tourism was conducted to investigate public's opinions on this issue including awareness, punishment and prevention of child sex tourism. The respondents of the survey prefer harsh punishment of child sex tourism offenders. Lastly, policy implications to put an end to and prevent child sex tourism are presented in two ways. In the prevention stage, (1) developing comprehensive national prostitution prevention strategy including sex tourism, (2) enhancing education on women’s and children’s rights, (3) eradicating Korean men’s widespread culture of sexual entertainment, (4) raising public awareness of child sex tourism, (5) encouraging self-purification efforts of travel industry, and (6) building a cooperative system between government agencies and NGOs are proposed. In the enforcement and punushment stage, (1) enhancing effective law-enforcement by training of the police and the prosecutors, (2) developing effective strategy to control child sex tourism, (3) building enforcing capacity by sending police officers in the destination countires, (4) imposing harsh and certain punishment are presented. The current study is expected to provide useful information on child sex tourism and sex tourism by Korean men, which enables relevant government agencies to establish a comprehensive and effective strategy to control and prevent prostitution committed in foreign countries as well as in Korea.