To provide a combination furniture capable of changing the fitting position of a drawer body between a desk and a wagon desk according to child's growth for realizing various service modes and solving all problems at a stroke, regarding leg space in the conventional desk, and the appearance and dead space of the wagon desk.

The combination furniture of a desk 1 and a wagon desk 2 has a liftable moving part 11 including a wagon top plate 1 at the upper position of a body 9. In this case, a drawer body 4 formed out of drawers 20 and a box body 21 capable of housing the drawers 20 in such a state as pulled back and forth, is mountable selectively on one of the lower surface of a desk top plate 5 and the lower surface of the moving part 11 of the wagon desk 2 via the same mounting means at a position between the elevated state of the moving part 11 and the body 9.