Purpose: This study is a repetitive comparative analysis of a qualitative case study that carried out a home visiting oral health education program. Method: This study conducted an interview survey through medical examination by interview before and after the home visiting oral health education and measured some pathogenic microorganism counts in the denture. Results: There was a positive change in the self oral care ability of the elderly at home after home visiting oral health education, including the behavior of self management of dentures, and some pathogenic microorganism counts in the dentures. Conclusion: The home visiting oral health education of home care service centers can improve oral health care for the elderly at home.