Abstract: A convertible bed-chair assembly comprises first and second solid assembly members which fit together in two different configurations. Corresponding planar surfaces of the members each include a cavity therein which is formed by an internal wall of the corresponding member and is unbounded at a first sidewall of the member. The assembly members each further include one or more recesses in a side wall thereof opposite the first sidewall. A pair of simple latches connect the members together in first, bed configuration wherein the first sidewalls of the members are in abutment and the cavities cooperate to form a concavity for receiving a futon or mattress. A further pair of simple latches connect the members together in a second, chair configuration wherein the first planar surfaces are in abutment and the first and second cavities form an internal storage space, and the recesses of the members are aligned to form a seat or seats.