To propose an inexpensive assembly set of a desk/chair made of corrugated paper which is suitably used as a desk/chair set for a baby/infant.

The assembly set 1 of a studying desk/chair is provided with: parts 2 for assembling the studying desk made of the corrugated paper; and parts 4 for assembling the chair. The parts 2 includes a folded plate 21, a top plate 23, a top plate reinforcing plate 25 and an inner plate 27. The parts 4 includes a folded plate 41, a seat plate 43 and a support plate 45. By folding the respective folded plates 21 and 41 into a U-shape and assembling the other parts to them, the studying desk 6 and the chair 8 can be assembled simply. The studying desk/chair for a baby/infant which is inexpensive and on which scribbling can be done freely is provided.