This study presents an analysis of the phenomenon of school dropout that occurred in the binational Informatics Technical Course at the Farroupilha Federal Institute, offered to Brazilian and Uruguayan students at the Quaraí/RS Reference Center, between 2015 and 2017, in the subsequent modality. This research is justified by the unique characteristic of the school dropout issue presented at this institution, as all the Brazilian students dropped out, in contrast to the Uruguayan students who remained until the end of the course, considering that the same number of places was offered to both nationalities. Using a qualitative methodology, this research was conducted as a case study. The instruments used to collect data included semi-structured interviews, bibliographical and documentary research. The theoretical review discussed throughout this work is based on an understanding of adult relationships, the relationship between work and binational technical education on the southern border in the face of school dropout. It also discusses the motivations behind the dropout phenomenon, revealing that these are driven by internal and external issues.