Major studies on cell production have put the emphasis on technical factors (machine order/layout, family part grouping, workflow sequence, etc.), it is still insufficient to investigate how workers' aptitude affect the productivity of production cells. In this paper, we put our emphasis on measuring the workers' aptitudes that significantly affect performance of production cells. Our study is different from researches reported so far in that we conducted a laboratory experiment of cell production to measure the productivity of the workers in production cells. Meanwhile we applied a short form of Five Factor Personality Questionnaire (FFPQ-50) to measure the workers’ aptitude. It was clarified that the emotionality of the workers has significantly a negative impact on the productivity and meanwhile, the playfulness contribute positively to the productivity.