PURPOSE: To provide combination furniture which is suitable for the efficient utilization of a narrow living space.

CONSTITUTION: This combination furniture is equipped with a pair of right and left lengthwise members 2a, 2b; a bridge member 4 that is fitted across between both lengthwise members and is also used as a back rest; and a bed element 5 which can be used both as a bed by pulling it out in a desired state and a sofa by making the bridge member 4 a back rest in a state in which part of the longitudinal side portion is put in a space on the lower side of the bridge member 4.