This study was carried out in order to examine demographic variables and personal and working conditions affecting to self-esteem, self-efficacy and work autonomy and mental health of the dental technicians. For this study, questionnaires composed of 50 items for the measurement of psychiatric symptom, work autonomy, self-esteem and self-efficacy index and 14 items related with demographic variables and personal and working conditions were distributed to 400 dental technicians and the 304 of them were statistically analyzed the results were as the following ; 1. Self-esteem and self- efficacy in dental technicians appeared to be interacted. 2. Score of self-efficacy index was higher in dental technicians of young age, or high or professional education than in otherwise dental technicians. 3. Score of self-efficacy index was higher in dental technicians of young age or professional education than in otherwise dental technicians. 4. All of self-esteem, self-efficacy and work autonomy in dental technicians affected directly their psychiatric symptom. 5. Promotion, and communication with fellows and senior workers of dental technicians affected directly their psychiatric symptom. 6. Each of anxiety, anger, depression and cognitive disturbance appeared to be interacted.