The Intolerance to Frustration Scale (IFS; Harrington, 2005) assesses a series of beliefs that promote intolerance to annoyance, exertion, injustice and uncomfortable emotions. Despite the importance of this instrument, there is no Spanish version of the EIF. In this work, the equivalence of a translation from the FIT was assessed by a panel of experts. Subsequently, by means of confirmatory factorial analysis (n= 799) it was concluded that the FIT has a multidimensional structure of four factors: Emotional Intolerance, Right, Intolerance to Discomfort and Achievement. However, 11 reagents had to be removed, which affected the internal consistency of some dimensions. The invariance of the instrument was also examined considering the age, sex and educational level of the participants, and evidence of validity was obtained by correlating the PIT with self-esteem levels. Psychometric results were acceptable, although some limitations to be considered before professional use were identified.