To provide collapsible furniture made of paulownia wood making the most of the characteristics of paulownia wood.

A first to a fourth box bodies 1, 11, 21 and 31, which are made of paulownia wood, are combined to be used as a bed, a living set and a chest. The box bodies made of paulownia wood excels in warmth retaining property, moisture retaining property and insect controlling property and they can be freely combined to be used as a comfortable bed, a living set and a chest with a high storage performance. Moreover connection devices 42 can connect the first to the fourth box bodies 1, 11, 21 and 31 horizontally or with one on top of another.