Bad odor, is unpleasant odor that going out along the expiration from the nose or mouth. Halitosis or bad odor is a common and distressing symptom for patients and their families or freinds, and its effects on social, job and family relationships are difficult. Since the medicinal plants are used the treat variety of diseases, in this study, it was tried to identify and report medicinal plants that are used in Iran Ethnobotanical foe bad odor of the mouth. In this review, search for articles by keywords of Mouth, teeth, mouth freshener, Ethnobotanical, Iran and medicinal plants was carried out. Search from databasesincluding Scopus, ISC, SID, magiran, and a number of the other data base wer done. According to the documents for Iran ethnobotany, 13 important medicinal plants are used to eliminate bad odor. Medicinal plants such as frankincense, oregano, clove East fluffy clove, ephedra, parsley, rosemary and other are the most important medicinal plants to eliminate halitosis. Probably these medicinal plants have the essence and aromatic oil and effective medicinal materials to eliminate halitosis. © 2017, Pharmainfo Publications. All rights reserved.