B ackground : Malocclusion is a dental and oral health problem that often occurs in children and adolescents. Dental and oral health in children in their growing period can be influenced by the knowledge and awareness of parents. Knowledge of dental and oral health, especially in the aspect of child malocclusion, is related to the level of education of parents. Objective : to determine the relationship between the education of the mother of students at SDN 005 Penajam, East Kalimantan with the level of knowledge about child malocclusion. Methods: using an analytical observational method with a cross sectional, the instrument used was a modified questionnaire of Pravara Institute of Medical Sciences & Rural Dental College, Loni, India. The study population was the mother of students at SDN 005 Penajam, East Kalimantan. Sampling using total sampling technique. Results: from 133 respondents, 60% (n= 24) mothers with higher education had good knowledge about malocclusion, 39.02% (n= 16) mothers with secondary education and 48.08% (n= 25) mothers with education. low have less knowledge about malocclusion. There is a relationship between the mother's education at SDN 005 Penajam, East Kalimantan with the level of knowledge about child malocclusion (p = 0.000) and r = 0.371 (sufficient correlation strength). Conclusion: based on the results of this study, it can be concluded that there is a relationship between the education of the mother of students at SDN 005 Penajam, East Kalimantan with the level of knowledge about child malocclusion (p = 0.000) and the correlation coefficient r = 0.371 indicating sufficient correlation strength. Mothers with higher education have better knowledge about malocclusion than mothers with middle and low education.