Evaluation is a very important part of the teaching-learning process. Different methods and actors may provide distinct elements for a better comprehension on the efficacy of the educational process. This way, there is an increasing attention for evaluation of students' abilities and attitudes. To involve patients in the evaluation may also provide special information. The present study evaluated students abilities and competences during Obstetrics clerkship through patients' perspectives. The questionnaire used a Likert scale and it was divided into three aspects: abilities of communication, clinical exam and professionalism. The results showed a good evaluation possibly due to a gratitude bias. However some items had a higher percentage of negative answers and these points should be noted by medical schools, as they can impact professional behavior. Patients' perspectives to evaluate medical students may provide feedback in order to improve medical education.