The current research aims to identify the relationship between psychological capital, career adaptability, and career success and to know the direct and indirect effects between psychological capital, career adaptability, and career success among the primary school teachers, The research sample consisted of (433) male and female teachers at the primary level. career adaptability (translation and Arabization of the two researchers), the psychological capital scale and the career success scale (prepared by the two researchers) were applied, After performing the appropriate statistical operations for research hypotheses by Using Pearson's Correlation Coefficient and Structural Equation Model It was found that there is a positive, statistically significant correlation at the level (0.01) between the dimensions of psychological capital and both career adaptability, and career success, It also found a direct, positive and statistically significant effect of psychological capital on career adaptability, and career success, As well as a direct, positive and statistically significant effect at the level (0.01) of career adaptability on career success, There is a positive, indirect, statistically significant effect at the level (0.01) of psychological capital on career success through the mediating variable of career adaptability.