In cancer treatment, perioperative oral functional management is used as a part of supportive care. Its main objectives are as follows: (1) preventing and reducing adverse events, (2) maintaining or improving nutritional status, (3) improving cancer treatment outcomes, (4) maintaining or improving quality of life, (5) providing high quality medical care through comprehensive oral care, (6) controlling odontogenic foci of infection, and (7) maintaining or improving oral function. A literature search was conducted using the electronic databases of Medical Journal and PubMed. Electronic database searches were performed using various combinations of the following key words: cancer, surgery, treatment, chemotherapy, radiotherapy and dental disease, oral care, oral management, dental intervention, oral health, dental care, and dental management. The selection of literature for inclusion in the review was restricted to dental management of patients receiving cancer treatment. In the course of the literature review, hand searches were also added as needed. The guideline was developed by summarizing the results of the review. Based on a review of the literature on the management of dental foci of infection in the oral functional management of patients undergoing cancer treatment, a guideline was developed by summarizing the results of the review. This report is a secondary publication of our previous review report “J. Stomatol. Soc. 70(4): 279–289. Dec 2021.”