A conversation support system and a conversation support method for providing a realtime communications environment in which a plurality of users simultaneously participate in a virtual world built and provided on a computer network for realtime talking. A shared virtual space accommodates remote communications infrastructures such as mobile telephone, PHS, and public telephone. Avatars can have a talk with each other by use of these infrastructures regardless of the locations of the communicating avatars, namely regardless of whether each avatar is inside or outside its aura. Namely, the avatars can communicate each other beyond a single shared virtual world. The PHS owned by each avatar can communicate with any PHS in another virtual world or even in the real world.