The learning readiness tests were developed to assess a child's level of preparedness for a specific academic program, and to serve functions of informing teachers of child's readiness for planning a new curriculum. The tests were designed to administer before school entrance. Among the specific functions covered are language, quantitative concepts, logical operation, visual and auditory discrimination, and memory. The purpose of this study was to investigate the construct validity of the learning readiness tests by factor analysis. For this purpose Level 1 test was administered to 540 children from age 4 to 5. The results of exploratory factor analysis by SAS program showed that the learning readiness tests assumed to have 6 latent factors. After then, with LISREL program, confirmatory factor analysis was conducted to estimate the unknown coefficients in a linear structural equation, and to test the goodness-of-fit of the real data in a structural model. Though the null hypothesis of six latent factor model was rejected by χ2 test owing to high degrees of freedom, the structural model with six factors still seems to be valid through specification search process.