PURPOSE: To automatically conduct the functional inspection of an interphone only be one inspection worker or automatically without the worker's going to the site by judging the level of a voice, which is sent from a slave interphone set, and recording the voice if it is normal together with providing a master interphone set, which sends the reproduced voice to the slave interphone set.

CONSTITUTION: Under the conditions that there is no user at any time set by a scheduler 13, an elevator operating mode is switched into an inspection operating mode by an elevator controlling part 5, so that a slave interphone set 9 in a cage room enters an acting state. At this time, an automatic announcing device 8 floats the voice in the cage room. The voice floated in the cage room passes a microphone of the slave interphone set 9 in the cage room, passes a speaker 18 of a master interphone set 6A in a machine room, and enters a check circuit 20. If the voice entered the check circuit 20 is normal, the voice is recorded by an absence-recording circuit 21 under the control of an interphone controlling part 14.