PURPOSE: To provide a bed capable of being stored combined in double folded and overlapped, by pivotally engaging a short side of a rectangular bed main body with a bed storage part and constructing so as to be freely put in and out.

CONSTITUTION: A short side of one bed 1' of a bed main body 1 is inserted between side boards 8 and connected to the side board by a pivotally connecting mechanism 12 to engage the bed main body 1 with a bed storage part 7 enabling freely being put in and out. The bed main body 1 is constructed to be separated into two of bed 1' and bed 1" in an identical shape. They are foldably connected by a connecting body 3 to each other to be overlapped when folded and in a rectangular shape when released. The connecting body 3 is provided with a mechanism to keep the bed 1' and the bed 1" in parallel and to produce a space between them when the bed 1" is folded. Thus the bed can be folded keeping a mat placed thereon to hold a uniform distance between overlapping parts of bed l' and bed 1", and the bed main body 1 is stored in the bed storage part 7 without receiving irrational force.