The aim of this investigation is to verify the factorial validity of the "Scale Irritation" in a sample of 181 teachers of Secondary Education from the center of Spain. At the same time, the investigation tries to verify the validity of construct of the scale correlating the results with the burnout evaluated through the Brief Questionnaire of Burnout adapted for teachers. The results obtained by means of the exploratory factor analysis of the Scale Irritation confirm the presence of two factors, as it appears in other international investigations. The confirmatory analysis verifies the proposal of a model of two factors. The significant correlation obtained among the Irritation Scale and the burnout confirms the validity of construct and verifies that a high irritation is associated significantly to the burnout, as it is foreseen by the theory, which considers both aspects related to the process of stress at work.