To provide a desk set helping utilize an auxiliary top when the auxiliary top is removed from an upper part of a wagon in the desk set that upper faces of the auxiliary top and the desk top are so structured as to be approximately flat-topped when the auxiliary top is set to the upper part of the wagon and that the wagon can be housed in a housing space provided below the desk when the auxiliary top is removed from the upper part of the wagon.

The desk set 1 includes the desk 2 and at least two housing parts 3 and 4. A board member 7 is removably provided on the upper part of one of the housing parts 3 and 4. The member 7 is removably provided on the upper part of the other of the housing parts 4 and 3 by removal from the one of the housing parts 3 and 4.