Culture plays an important role in human social life,and cultural factors are also an important basis for the modernization of national governance.A strong culture makes a strong nation. This study aimed to develop a cultural efficacy scale for elementary school students in China and test its psychometric properties. The scale was conducted among 911 elementary school students (Mage = 10.64, SDage = 1.82, Nboy = 488). The data were then randomly divided into two groups. Group 1 (n = 457) were used for item and exploratory factor analyses, and Group 2 (n = 454) were used for confirmatory factor analysis and for providing criteria evidence. Fourteen items were retained in the scale, and the cumulative method interpretation rate was 48.75%. Statistically significant differences existed between the high and low groups in the independent samples t test. The structural model was well fitted (RMSEA = 0.056, SRMR = 0.044, TLI = 0.920, CFI = 0.934), and the range of factor load was 0.308–0.676. The Cronbach’s alpha was 0.83, and criteria evidence was moderately significant. The outcomes show that the developed scale has good reliability and validity and can be used to assess the cultural efficacy level of elementary school students.