The study assesses the psychometric properties of the Italian version of the Norwegian Teacher Self-Efficacy Scale--NTSES. Multiple group confirmatory factor analysis was used to explore the measurement invariance of the scale across two countries. Analyses performed on Italian and Norwegian samples confirmed a six-factor structure of the scale with a strong factorial invariance. The analyses conducted on the Italian sample supported good internal consistency and test-retest reliability. The Italian version of the NTSES showed expected correlations with measures of job-related well-being. These results confirm the good psychometric properties of the Italian version of the NTSES. (Contains 4 tables and 1 figure.)