This study explored factors affecting attractiveness ratings of organizations as places of work by college students, focusing upon changing effects of factors over the student grade years. A questionnaire including 10 job orientation items, 10 life style items, and rating scales of attractiveness of 8 organizations in the Central Japan area, was administered to 1442 students derived from 8 local universities. Data were analysed by the multiset factor analysis method for each grade group separately. Results of the analysis indicated that the factor structures of life style and attractiveness of organizations changed as a function of the grade year; Two life-style factors for freshman and sophomore groups, namely, establishment and self realization changed into the more realistic promotion and private life factors for junior and senior groups, and the facter structure of attractiveness became more complex as the grade year progressed. Correlation matrices between factors suggested that (1) the strongest determinant of attractiveness of organizations was a student's major field among freshmen, (2) effects of life style upon attractiveness were the strongest among sophomore and junior groups, and (3) fewer salient determinants of attractiveness were found for the senior group.