Abstract
In this research, we are focusing on the physical customization of robots, and we tried to introduce "mutual" process into the customization. In this paper, we show a customizable communication robot which is installed the self-body-assertion (SBA) system which can accept / reject its user's customization. We carried out an experiment to verify the users' impression for the SBA system. As the results, we confirmed that the rejection by the robot increased "Interestingness", but decreased "Friendliness".