To permit writing and reading in an easy posture and to permit compact accommodation by providing a table which is loosely engaged with a receiving rail extending in the fore-aft direction and which can be pulled out to a front side, and providing a shelf at the bottom face level which is higher than the upper face level of a plate of the table on a rear side wall wainscot with a shelf.

When a pupil 10 writes or reads, the pupil 10 sits at a center portion in fore-aft direction of a mattress 7 facing a rear side A, and then grabs a plate 2 of a table 1 reaching with one hand to the rear side A. Then, the pupil 10 pulls out the table 1 from directly below a shelf 5 toward a front side F using a receiving rail 4 for using the table 1. Also, at the time of writing or reading in an easy posture, the pupil may pull out a legless chair 6 from directly under a bunk lamp M reaching with one hand toward the rear side F after sitting on a center portion of the mattress 7 facing the rear side A. Then, opening the legless chair in L shape, inserting a seat plate under one's own buttocks, the pupil may reach for the plate 2 of the table 1 in the rear side A and pull the table 1 from directly under the shelf 5 toward the front side F using the receiving rail 4 to use the table and the legless chair 6.