The purpose of this study is to clarify the job-content of Japanese industrial engineers in terms of personal attributes. From the research made on 5610 industrial engineers, some tentative conclusions may be drawn as follows : (1) The funciton of industrial engineers is more specialized in larger companies. The job of industrial engineers at a lower level of management is limited to a narrower field related to the traditional IE. The scope of industrial engineers' job at a higher level is broader and its content is related to the modern IE. (2) In smaller companies, the function of industrial engineers is not so specialized as in larger companies.