To provide a telephone system capable of making another telephone set present nearby participate in speech communication under communication by a simple operation during the speech communication with an opposite party under the communication.

In the case of making a nearby cable telephone set 4A participate in the communication under the speech communication during the speech communication with an opposite terminal 6 by a movable radio telephone set 3A, the operator of the telephone set 3A first brings the telephone set 3A near the telephone set 4A and reads ID information specifying a telephone number or an extension line from a tag 49A of the telephone set A by the reader 38A of the telephone set 3A. Then, the telephone set 3A transmits a communication conference request including the read ID information to a call controller 1, and the call controller 1 broadcasts and distributes the speech communication of the telephone set 3A and the opposite terminal 6 under the speech communication to the telephone set 4A. The call controller 1 also relays and transmits voice from the telephone set 4A to the opposite party under the speech communication.