Purpose: This study was done to clarify the concept analysis of positive psychological capital. Methods: Walker and Avant"s concept analysis process was used in this study. CINAHL, ProQuest, Web of science, NDSL, RISS databases from 2004 to 2016 were searched using the keywords ‘Positive psychological capital" and ‘PsyCap". Sixty-one relevant articles and three book were finally selected. Results: Analysis of identified literature indicated that positive psychological capital attributes were developable potential, positive cognition, expression of emotion, multiple psychological capability, and resources with positive effect. The antecedents were goal achievement, training, leader"s motivation, and supportive organizational environment. The consequences were overall wellbeing which is composed of individual"s physical, psychological and social wellbeing and enhancement of work outcome. Conclusion: The findings in this study provide a definition of the concept of positive psychological capital and theoretical evidence for the future research for nurses including program development.