There is provided a space information sharing apparatus, a space information sharing method, and a program adapted to let users feel as if their spaces are interconnected in a multidirectional communication system while saving bandwidth. A control section is provided to control communication of space information indicative of appearances of a space of a first user to an apparatus of a second user on the basis of first sensing information representative of the state of the first user and second sensing information representative of the state of the second user. This technology is applied advantageously to multidirectional communication systems.