This study examined the psychometric properties of the German version of the Teacher Inclusive Education Self-Efficacy Scale (TIESES). Five hundred and nineteen teacher education students from Austria and 765 teacher education students from Germany participated in the study. Results of a multiple-group confirmatory factor analysis (for the two countries) confirmed a single factor structure of the scale with partial scalar measurement invariance. Regression analysis showed that self-efficacy when implementing inclusive education was explained by the motivation to deal with inclusive education during their studies, previous experience with inclusive education in internships, study interest and the country in which the students went to university.