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.