PURPOSE: To expand the loading surface area of a top plate which is then stably supported, by rotatably providing a support part for a main plate part of the top plate and a pedestal in order to support the main plate part if auxiliary plate parts are folded but while supporting both main plate part and auxiliary plate parts if the auxiliary plate part is expanded.
CONSTITUTION: If a table is used in a narrow space or by a small number of persons, auxiliary plate parts 14-1 through 14-4 are folded around hinges 22-1 through 22-4 toward the loading surface 8 of a main plate part 10 of a top plate 4. A support part 24 for the main plate part 10 of the top plate 4 and a pedestal 6 is rotated and positioned so that corner parts 28-1 through 28-4 of the support part 28 are aligned with top corner parts 32-1 through 32-4 of the main plate part 10. If the table is used in a wide space or by a large number of persons, the auxiliary plate parts 14-1 through 14-4 are expanded outside of the loading surface 8 of the main plate part 10. The support part 24 for the main plate part 10 and the pedestal 6 is rotated by a rotary mechanism 36 so that the corner parts 28-1 through 28-4 of the support part 24 are directed to corner parts 18-1 through 18-4 of the auxiliary plate parts 14-1 through 14-4, being extended from the side edges of the main plate part 10.