The idea of psychological capital originated from positive psychology, which stresses that individuals develop positive abilities instead of negative memories from their past experiences (Ryan & Deci, 2001; Seligman, 2012). Positive psychology is a science based on subjective experiences, positive personal traits, and positive organization, with the goal of improving quality of life and preventing abnormality (Ryan & Deci, 2001). The purpose of positive psychology is to investigate and uncover a vision of a better quality of life for people. The core concept of “psychological capital” is based on this concept (Luthans, Youssef, & Avolio, 2007). Psychological capital is a combination of the concepts of “positive psychology” and “capital”. Traditional economical capital focuses on “what you have”; human capital focuses on “what you know”; social capital focus on “who you know” in interpersonal relationships, and psychological capital focuses on “who you are” (Luthans et al., 2004), in other words, what your own personal characteristics are. Thus, this study was aimed at an exploration of whether it is possible to separate preschool teachers’ negative emotional labor from the aspect of their psychological capital by understanding their psychological capital.