Sex trafficking is a global phenomenon affecting mainly women. This phenomenon is highly apparent in Greece, where thousands of migrant women end up trafficked. In order to understand why this happens, it is important to know the underlying causes of it. Therefore, this researched aimed to find the reasons why migrant women end up as sex trafficking victims in Greece. This was done through primary material gathering, in form of interviews with anti-trafficking agents in Greece, followed by a theme analysis, finding six key themes with reasons why migrant women are trafficked. These were, Vulnerability (of migrant women), Greece as the Portal to the EU, Government Deficiency, Hostility and Segregation (hostility of Greek national towards migrants which leads to their segregation), Trafficking as a Profitable Industry and Cultural Gender Oppression. To further analyze these themes, a triangulation method was used, which compared these results to previous literature on the issue and then further problematized it through different migration and gender-related theories.