Objective：To evaluate the incidence and prevalence of dental anxiety in adult outpatients and to discuss the related in－ducing factors. Methods：A questionaire survey was conducted with 300 adult outpatients，aged older than 18． All participants com－pleted the modified dental anxiety scale（MDAS）． Level of dental anxiety was evaluated by MDAS. Results：The mean MDAS score was （11.98±2.34）. Prevalence rate of dental anxiety was 36.4%. Significant statistical differences of the incidence of dental anxiety were found in regarding to sex，marital status，economic income，education level，self-rated oral health status，being initial treatment or not（P＜0.05）；but not to nationality and age. Logistic regression analysis demonstrated that the risk factors of dental anxiety were sex，age，economic income and self-rated oral health status. Conclusions：The incidence of dental anxiety is high for the oral adult out－patients. The incidence of dental anxiety is positively correlated with sex，age，marital status，economic income，education level，self-rated oral health status，being initial treatment or not.