To solve the problem of a furniture system that embodiments of arrangement are restricted as main tables and a sub-table can be relatively moved only around the pivot of a hinge mechanism when a main top board and a sub-top board are connected with each other through the hinge mechanism.

In a pair of the main tables 1, the main top boards 11 are arranged face to face, the sub-table 2 with the sub-top board 21 which can adjoin one side both the main top boards 11, free end links 3 connecting each of the main top boards 11 with the sub-top board 21 in such a way that they are relatively rotatably connected with each other under a condition where connecting effective lengths are respectively changeable and a locking means 4 for respectively fixing at least the connecting effective lengths of these free end links 3 at a required position are provided and by releasing the fixed condition by the locking means 4, each of the main top boards 11 and the sub-top board 21 can be relatively moved.