ABSTRACT. Background: The prevalence of malocclusion in Indonesia is very high, which is around 80% of the total population. Orthodontic treatment in the mixed dentition stage is the right time to minimize the occurrence of malocclusion, and it requires space analysis in advance. To predict the space required in space analysis, prediction methods can be applied, such as Moyers method, Tanaka- Johnston method, and Sitepu method. These three methods are obtained from studies with different races. Objective: This research was conducted to determine the differences in the results of space analysis with the three methods. Methods: Seventy-three (73) dental casts were obtained from children aged 8-12 years at SD Negeri Gubeng 1. The space available and space required was measured by these three methods. The discrepancy of these methods was calculated based on the space available and the space required. The results were statistically analyzed using Kruskal-Wallis. Results: By Kruskall-Wallis test, the space analysis measurement method in maxillary arch showed no significant differences (p> 0.05), while in mandibular arch showed significant differences (p< 0.05).Mann-Whitney Utest on the maxillary arch showed no significant differences (p> 0.05), while in mandibular arch was (p< 0.05). This means that there was a significant difference between the Moyers method in mandibular arch and the Sitepu method in mandibular arch, and also between the Tanaka-Johnston method in mandibular arch and the Sitepu method in mandibular arch. Conclusion: By using these three methods, the results of space analysis on mandibular arch showed a significant difference, while on maxillary arch showed no significant differences.