Objectives: The purpose of this study was to understand the effect of positive psychological capital on job satisfaction and job performance for dental hygienists. Methods: A survey was conducted from August to October 2020 among dental hygienists from a dental clinic in Busan, South Korea, and a total of 162 valid responses were analyzed. The statistical tool used for analysis was SPSS 25.0 (IBM Crop, Armonk, USA) and the significance level was 0.05. Results: The results of this study showed the relationships between job satisfaction with positive psychological capital (r=0.85, p<0.01), as well as job performance with positive psychological capital (r=0.88, p<0.01). There was a positive correlation between positive psychological capital and job satisfaction (r=0.85, p<0.01); and the contributing factors for the same were hope (p<0.05) and optimism (p<0.001). Further, positive psychological capital and job performance were positively correlated (r=0.88, p<0.01); the influencing factors for the same were hope (p<0.01), dynamic stability (p<0.05), and optimism (p<0.001). Conclusions: It is necessary to develop various intervention programs and strategies to strengthen the positive psychological capital in dental hygienists since it affects their job satisfaction and job performance.