The main purpose of this study was to identify factors (including selected demographic characteristics & psychosocial variables) that may influence prosthodontic treatment intention of tooth loss patients. By using a purposeful sampling method, 192 adult dental patients who at least lost one tooth were selected to participate in this survey. The data was collected by a self-administrated questionnaire in 4 dental clinics in Xindian City from Sep. to Nov. 2005. T-test, one-way ANOVA, point- biserial correlation, Pearson’s product-moment correlation & multiple regression were used to analyze the data. The results indicated that: 1.62.5% of the subjects had positive intention for prosthodontic treat- ment in the future 2 months. 2.The subjects’ Outcome Expectancy & Social Support for pros- thodontic treatment were positive, but Knowledge & Self-efficacy was poor. Besides, Perceived Barriers & Dental Anxiety were high. 3.The following subjects had poorer treatment intention: Taiwanese, betal nut chewer, positive perceived oral health, had lost tooth for more than 10 years & had no or bad prosthodontic experience. 4.Outcome Expectancy, Perceived Barriers, Social Support & Self- efficacy were significantly associated with treatment intention. 5.The related variables explained 46.5% of the variance in treatment intention. Among them, Self-efficacy, Perceived Oral Health, the Period since tooth was lost, Outcome Expectancy & Betal-nut Chewing were significant predictors of prosthodontic treatment intention.