The purpose of this dissertation was to investigate how college students\' adjustment (CSA) affects their career decision (CD), based on analyses of the relationship between college students\' adjustment and their career decision. For the purpose of articulation of the relationship, this study implemented factor analysis to find out the sub-factors of CSA and those of CD and developed conceptual frameworks for CSA and CD. As results, this study reveals that, at first, male students had higher scores in the affective adjustment scale and the olders and the higher graders had higher scores than the youngers and the lowers. Secondly, freshmen showed higher scores in relation to the career decision withholding factor. With regard to students\' regret for career decision, 19 to 20 year-old-students demonstrated higher scores. Thirdly, students had lower scores in the career decision withholding factor and in the factor of regret for career decision when they had higher scores in social adjustment. Students scored higher in affective adjustment they scored lower in regret for career decision. Also, they scored higher in the factor of career decision stability when they had higher scores in the factor for personal relationship.