The purpose of present research was to investigate factor structure, convergent validity and reliability of career adaptability scale (CAAS). The research statistic population was first-year high school students in shahrekord. The samples were 400 students (200 males, 200 females) that were selected by cluster random sampling. Research instruments were Career adaptability scale and NEO Personality Inventory. Data were analyzed by using factor analysis and correlation tests. Confirmatory factor analysis results indicated that the hypothesized model was consistent with data and Career adaptability scale had four separate factors include concern, control, curiosity and confidence. Its internal consistency by using Cronbachs' Alpha was 0/91 and the 4-week test-retest coefficient was 0/92. Neo-scale correlation test also showed that every four career adaptability scales with four of the five factors of personality include extraversion, agreeableness, openness and conscientiousness positively correlated and have a significant inverse association with neuroticism factor. given to these results, It can be said Career adaptability scale is an appropriate and valid instrument for measuring students' career adaptability.