The purpose of this research was to test the measurement model of students' academic motivation. The research data is taken from the State Junior High School students (118 students), consisting of 4 different schools. Validity for this scale is accomplished through confirmatory analysis, while scale reliability uses Cronbach's alpha reliability and composite reliability. Confirmatory factor analysis showed good fit data (χ² = 54.005, df = 43, p = 0.121, RMSEA = 0.047, GFI = 0.935, and CFI = 0.976). Internal consistency with Cronbach alpha coefficient was found at 0.765 and composite reliability was 0.721. The result of loading analysis of aitem-aitem factor shows the lowest 0.054 and the highest 0.86. Loading factors on 3 behavior, thought and emotion constructs show the range of 0.68 to 0.87 and statistically significant at p = 0.001. The results show that measurement model the scale of academic motivation is valid and reliable.