摘要:The aim of this study is to develop a scale that measures active citizenship self-efficacy. Because self-efficacy identifies a person’s perceived beliefs towards his or her capacity and ability to succeed a task, it has a motivational and causative role in one’s possible acts or behaviors. For his reason, measuring active citizenship behaviors through self-efficacy is of special importance for understanding citizenry behaviors. The study explores the development of the Active Citizenship Self-Efficacy Scale (ACSES) and its psychometric properties. Participants consist of 414 university students, of which 326 were female and 88 were male. The validity of the scale was tested via explanatory and confirmatory factor analysis. The results for explanatory factor analysis with principal component solution indicated three factor structure that explains 57,17 percent of the total variance. Since the chi square test indicated that our data was meaningful, we also conducted a confirmatory factor analysis and found the indices of goodness of fit as for RMSEA = .070, GFI = .90, CFI = .97, NFI =.95, RFI = .95, AGFI = .87, IFI = .97 and NNFI = .96. These results from both explanatory and confirmatory factor analysis indicated that scale obtains construct validity criterion. The Cronbach alphas’ of the ACSES for the total 18 items and subdomains were found .90, and .84, .82, and .86 respectively. Since the determination of citizens’ self-efficacy level can in part reflect the results of citizenship education and practices we believe that this scale has a potential use in citizenship studies.