This paper proposes to evaluate teaching competence (class behavior, methodology and knowledge, relationship, evaluation and usefulness) trough MBA students' perceptions and their causal relations with teaching evaluation. In a research with 99 responses it was observed that the teachers evaluation was good with average score higher than 2.50 (middle of scale). The average was: classes' behavior - 4.07, methodology and knowledge - 3.92, relationship - 3.70, evaluation and usefulness - 3.74. Causal relations were found in: methodology and knowledge vs. evaluation (β= 68.5%), evaluation and usefulness vs. evaluation (β= 23.5%), classes' behavior vs. evaluation (β= 13.4%), methodology and knowledge vs. total average (β= 52.1%), evaluation and usefulness vs. total average (β= 21.45%). These results prove that methodology/knowledge and evaluation/usefulness are the most important antecedents of teachers' evaluation.