Purpose: The purpose of this study was to develop a sexuality education course of study for students in the lower grades of elementary school. Method: On the basis of the sexuality education guidebook for elementary school students published by Korea Ministry of Education & Human Resources Development, the state-designated textbooks for first to third grade were analyzed. Results: 1) In the category of physical and psychological development, physical development and psychosexual development content were covered, but not sexual health content. 2) In the category of understanding of human relationship, marriage and family, and the opposite sex and love were presented but self-determination and selection were only partially presented. 3) In the category of sexual culture and sexual ethics, sexual role in society was covered, but not social environment or equality of the sexes. Conclusion: These results suggest that content on sexuality which is not covered in textbooks for students in lower grades should be included in other school courses or activities in class.