This paper proposes a new avatar for generating non-separable relationship between your own body in the real space and your avatar in the virtual space, and changing your body sensation. This avatar ("Shadow Avatar") has two exclusive properties. One is that Shadow Avatar has some redundant degree of freedoms. And these freedoms generate the gap between your body motion and your Shadow Avatar motion. The other is that Shadow Avatar is projected with your body shadow and your Shadow Avatar superimposed. From the results, it was indicated that the body shadow is effective to support the generation of non-separable relationship between body and shadow avatar. Furthermore, experimental results indicate the possibility that this method using Shadow Avatar is effective to support for changing the body sensation and generating the body expression.
