This research aimed to validate the Academic Success and Failure Attribution Questionnaire (ASFAQ) and analyze gender and age differences in middle and high school students in Italy. Methods: From the ASFAQ questionnaire validated with Spanish students, an analysis of the psychometric characteristics of the scale was carried out using a Confirmatory Factor Analysis (CFA). To compare ASFAQ scores by gender and school year, the independent samples parametric t-test and Pearson’s coincidence test were used. (3) Results: in total, 976 students participated in the research, of which 515 were middle school students and 461 were high school students. The results showed a validity of the ASFAQ for Italian students, in addition to statistically significant differences between males and females, and school year. (4) Conclusions: The ASFAQ is reliable and valid to assess the attributional styles of academic success and failure in an Italian context. There are significant differences in sex and school year, and a consequence with age