One of problems in early children development is that some children still have stiffness when using their fingers. This study aims to determine the effectiveness of the application of eggshell collage in improving the fine motor skills of children in Harapan Ibu Kindergarten. This study uses a quantitative approach with the type of Quasy Experiment research. The sample of this study includes two classes, the experimental class and the control class, with 15 children. Data collection techniques in the form of tests, observations, and documentation. Based on the results of the post-test scores of the experimental class, there was an increase in the average score of children's abilities from 22.3 to 31.2. Furthermore, the calculation results of the Man-Whitney test show the Asymp value. Sig (2-tailed) 0.000 which is less than 0.05. from these results, it can be concluded that eggshell collage is effectively used to improve children's fine motor skills. Then from the calculation of the effect size test, the result is 1.696 (d > 0.8), then the effect is classified as a high effect.