PURPOSE: To render favorable service to a reference floor when the reference floor gets crowded by providing a device for calling two elevators to a predetermined floor through operation of a specific switch installed on the predetermined floor of a building.

CONSTITUTION: When an elevator A stands by on a reference floor and an elevator B stands by on another floor, if the number of elevator users on the reference floor of a building is increased and a switch SW installed on the reference floor is operated, a relay 70 for calling the reference floor is energized by a circuit of a contact P-SW-70-N and open contacts 701 and 702 are closed. As the elevator A is stopped on the reference floor, an open contact 40A1 is closed, and a relay 70A is energized by circuits of the contact P-40A1 and the contact 701-70A-N, open contacts 70A1, 70A2 and 70A3 are closed, a relay 50B for commanding the elevator B to stand by on the reference floor is energized by a circuit of the contact P-70A2-50B-N, and the elevator B is called to the reference floor.