Over the years, various studies addressing different populations have consistently raised concerns about the unidimensionality of the Revised UCLA Loneliness Scale. In the present study, the factorial structure of the scale was examined by comparing it to alternative models. In a sample of 1,157 French Canadian teachers, results of confirmatory factor analysis support a three-factor model solution. Support for the invariance of this model across sexes and teaching levels (i.e., elementary and high school) was also obtained.