Background : Stunting is a condition of failure to grow to achieve normal growth due to malnutrition in a long period of time. Prevention and treatment of stunting can be done by increasing the mother's knowledge about one pillar of access to nutritious food so that children avoid stunting. Providing education to mothers can be done using brainstorming methods about preventing stunting with one pillar of access to nutritious food. The Aim : This study aim to find out the effect of stunting prevention education about one pillar of access to nutritious food with a brainstorming method on the knowledge of Baduta's mother in Taman Sari Timur. Methods : This research method is a pre-experimental study with one group pretest-posttest design. The study was conducted in Taman Sari Timur Village in December 2019. Data collection is carried out quantitatively. The population and sample were 38 baduta mothers present at the Taman Sari Timur village Posyandu which were taken with a total sample technique. Quantitative data includes maternal knowledge before and after the intervention. Data analysis using statistical tests used paired sample t-test. Data on maternal knowledge about stunting was collected using a pretest and posttest questionnaire Results : The results of the influence of stunting prevention education on one pillar of access to nutritious food with a brainstorming method on the knowledge of Baduta's mother In Taman Sari Timur obtained an average of 73.83 and after the education of stunting prevention using a brainstorming method was obtained an average of 83.94. From the research results obtained t value of 4.384 and p of 0.000 <0.05. Conclusion : There is an influence of stunting prevention education about one pillar of access to nutritious food with brainstorming methods on the knowledge of Baduta's mother in Taman Sari Timur.