Recent decades have witnessed an increase in the societal implications of medical error, a subject in which Medicine and Law intertwine. This study focused on medical error from the perspective of medical students and law students, assessing their level of interest and information and the need to discuss the topic during undergraduate education and how it occurs in each field, in their view. A cross-sectional, descriptive, observational study was conducted at the Federal University in Juiz de Fora, Minas Gerais State, in 2008 with 185 medical students and 119 law students. 88.7% of the medical students and 92.4% of the law students reported knowledge of medical error. The interest was due to the fact that medical error is currently a widely discussed issue. The students thought the issue should be addressed in their undergraduate education (97.8% of medical students and 94.9% of law students). It is important to discuss such a current issue in undergraduate education in both medicine and law, because of the potential for decreasing the vicious circle of errors, iatrogenesis, and law suits, in addition to fostering reflection on the role of medical education in the ethical training of young professionals.