The aim of this study was to evaluate the psychometric characteristics (reliability and factorial structure) of Social Interest Scale for Iranian Children (SISIC) based on Adler’s theory. From different cities in Iran, and through a multi-stage cluster random sampling method, 290 children were recruited as statistical sample. The scale was answered by parents of children. Confirmatory factor analysis to evaluate factorial structure was used. In order to evaluate reliability, the Cronbach's alpha coefficient was used.The results of indicators of fitness showed that the proposed model is suitable. And second order factorial structure with four subscales of social interest scale (Responsibility-task doing, Relationship with people-empathy, Confidence-Assertive, Equality vs. Inferiority-superiority) had acceptable fit with the data. Cronbach's alpha for the four mentioned subscales as well as the total score was obtained: 89.0, 85.0, 72.0, 83.0 and 92.0. This indicates that this scale has an acceptable internal consistency. Gender comparison displayed that the girls had higher scores in the Social Interest scale, and also in responsibility-task doing, and Equality vs. Inferiority-Superiority. Accordingly, we can suggest that SISIC is a reliable and valid instrument to evaluate Social Interest in Iranian children ageing 4-12.