The sanitary act of cleaning hands and fingers using running water with soap that humans do to make their hands clean and break the chain of germs is called handwashing with soap. Hand washing with soap (CTPS) is often called one of the efforts in disease prevention. This study aims to determine the effect of health education using audiovisuals on elementary school children about hand washing with soap. This type of research is a pre-experimental design, using a one-group pre-test-ppost-test design. The sample in this study amounted to 70 students obtained by the accidental sampling technique. The normality test obtains the results of abnormal data distribution, and then the hypothesis test analysis uses the Wilcoxon test. The results of the Wilcoxon Test on knowledge and ability each obtained sig. = 0.000, it can be concluded that providing health education using audiovisuals has a significant effect on increasing knowledge and ability to wash hands with soap in elementary school students. It is necessary for interactive and interesting learning media so that students can more easily receive messages or information to be conveyed and can practice what they see and hear.