The FUP has been facing the challenge of reducing the high evasion rates. From its inception until the second half of 2014, the FUP trained 597 students and had 768 students evaded, reaching a number of dropouts about 30% higher than the number of graduates. The objective of the study was to analyze the causes of evasion in the undergraduate FUP courses. The data was obtained through the application of a questionnaire for students who had graduated and evacuees of the institution. The analytical instrument employed was logistic regression with the questions related to the socioeconomic, motivational and familiar aspects of the former students as explanatory variables of the evasion. The results indicated that the main causes of FUP evasion were related to economic difficulties and the lack of interest of students. From empirical verification, the study contributes to the understanding of the complex phenomenon that is evasion and presents practical results that support university management.