This study aims to test the effect of Riau Malay Culture-Based Digital Books (BuDi SDaYU) on improving prosocial behavior of children aged 5-6 year’s at Pembina 02 State Kindergarten, Kampa District, Kampar Regency. Using a quantitative approach with a true experimental design of the pretest-posttest control group type, 46 children were randomly divided into experimental and control groups. T…