Recently, the government authorities and dentists are all promoting the oral health for the general public and children, and then the prevalence of the caries in school children is significantly reduced. But that does not reach the criteria of WHO. The possible explanation is that it could be due taking tooth-clearing tools were not convenient. Xylitol contained in the chewing gum can not be metabolized to acid by bacteria in oral cavity, and it reduces the amount of dental plaque and Streptococcus mutans. Therefore, it can prevent the development of caries. Beside that, it can be taken personally and conveniently. Thus, the xylitol chewing gum might be a option for oral health promotion.