PURPOSE: To provide partition housing furniture as system furniture which is stable even when a vertical direction size becomes large.

CONSTITUTION: A base housing body 10 comprises a bottom plate 11, two side plate 12, 13, an upper plate 18, and a back plate, the bottom plate 11, back plate and upper plate 18 are positioned between both side plate 12, 13, a stacking housing body 20 comprises two side plates 21, 22, an upper plate 26, and a back plate 23, the back plate 23 and the upper plate 26 are positioned between both side plates 21, 22 and they are formed in such a way that an upper surface of both side plates 12, 13 of the base housing body 10 can be joined to a lower surface of both side plates 21, 22 of the stacking housing body 20. They are also formed in such a way that the stacking housing body 20 can be joined above the stacking housing body 20 further.