This study aimed to explore possible relationships between self-efficiency and intention to leave in dental hygienists so as to provide basic data for developing solutions to effectively manage dental hygienist man power. A total of 206 dental hygienists from different dental care institutions in Cheonbuk Province were chosen as subjects by a convenience sampling method. Data were collected through a self-reported survey. The results were as follows. The self-efficiency was higher among dental hygienists who were more than 36 years of age, had graduated university, were at their cuurent job longer than 11 years, and reported their annual income to be more than 25 million won. As their age was younger and their education and income levels were lower, their intention to leave was stronger. Also subjects who were unmarried, did not feel satisfaction with their current job, and did not want to stay any longer at the location where they were currently working tended to have higher intention to leave. The higher their self-efficiency, the lower their turnover intention. An examination of the three factors offered by a factor analysis on self-efficiency, 1) sense of competence, 2) sense of confidence, and 3) strong drive, revealed that the higher their sense of competence, the lower their turnover intention. It was also revealed that their self-efficiency had a significant influence on their turnover intention and the most influential factor was their sense of competence.