This study aimed to measure psychological capital of seminary students and to investigate the reliability and validity of a general scale of psychological capital among a group of seminary students. In doing so, 314 seminary students filled out “the Revised Compound PsyCap Scale” along Subjective Happiness Scale, Satisfaction with Life Scale, and Self-Esteem Scale. Results showed that Cronbach's alpha of the psychological scale was at .89. Correlations of this scale with happiness, life satisfaction, and self-esteem were moderate to strong showing convergent reliability of the scale. There were not any significant differences between the sexes in psychological capital. However married individuals scored higher than unmarried individuals in psychological capital. Also, level of psychological capital of seminary students was higher than three samples from other countries. This study introduced a valid and reliable psychological capital scale to Iranian scholars and depicted the status of psychological capital in a group of Islamic seminary students.