Nowadays, the ethical problems faced by engineers become hard to solve independently. Group work has been widely brought to education of engineering ethics for the purpose of uplift of behavior design ability in the face of ethic problem. However, it is difficult to evaluate the educational effect of group work collectively. For the betterment of educational effect, it is important to know how students think for each topic. Therefore, I conducted the questionnaires based on Semantic differential method about images of group work for four different topics on students. In this paper, I analyzed their images of group work with principal component analysis and clarified that their images of group work are changed due to the difference of topics.
