The group walking is seen here and there frequently in Japan. The walking with the partner gives them the motivation to continue the exercise. In this paper, we propose the group walking support system which allows the users to walk with the partners around the street in the shared virtual space. It also provides the smooth communication with partner by using the users' avatars and their footsteps' sound. We also discuss about the effectiveness of the proposed system and the functions i.e. footsteps' sound and users' avatars, which offers the feeling of co-existence with their partners to users in the shared virtual space.