The purpose of this study was to develop the Career Awareness Scale for junior high school students. The four areas of career awareness which have been emphasized in Japanese career education consisted of interpersonal relationship, informational utilization, future planning, and decision-making. The Career Awareness Scale was developed based on these four areas. Reliability of this scale was supported by internal consistency (Cronbach's α), coefficients of congruence between component loadings from two samples, and coefficients of test-retest reliability. Validity of the scale was examined by teachers' evaluation of content validity of the items and correlations between the four areas and subscales of the Educational Personality Inventory for Career Guidance (EPIC). These results suggested that the Career Awareness Scale was appropriate and useful to measure effects of career education practices.