In a teaching-learning process, it is essential that the evaluation is summative and formative, from an analytical and holistic basis so that the process is comprehensive and integrates the work that the student has developed throughout the course, for example, a portfolio of evidence. Van der Schaaf and Stokking (2008) state that a portfolio of evidence integrates elements that must be related to each other, in order to be considered valid and reliable to evaluate the teaching-learning process, the elements are: a) the teacher model, b) the task model, c) the scoring model and d) the interpretation model. The objective of this research is to analyze the use of the portfolio of evidence as an evaluation tool within the teaching-learning process, for the Competency-Based Educational Model of the University of Guanajuato. This is a quantitative research with descriptive scope. A 22-item questionnaire was used considering the instrument developed by Romero and Crisol (2011) called "Opinion, satisfaction, usefulness and feelings of students about the use of the portfolio in learning and self-evaluation". The instrument was applied to a sample of 183 students of the Bachelor's Degree in International Commerce of the Economic-Administrative Sciences Division of the University of Guanajuato, distributed in four different Learning Units. The results indicate that students consider important the use of the portfolio of evidence as part of their teaching-learning process. In the part of satisfaction, usefulness and feelings, the students consider that the use of the portfolio is very important as a pertinent and adequate tool, and it is considered useful for learning, since besides serving as reinforcement, it implies a free and creative exercise. As conclusions of the study, the importance of the portfolio of evidence as a method of evaluation in accordance with the Educational Model by Competencies of the University of Guanajuato, which has also been well received at least by the sample of this study, is manifested. As future lines of research, it is expected to expand the sample to other careers and learning units to verify the applicability of the results of the study.