A radio communication system has a memory for storing a channel number specifying a transceiving channel, one of a plurality of group codes allocated to each transceiving channel, an ID code which is unique to the radio communication system, and names of other radio communication systems, and a control unit for controlling voice communication with the other radio communication systems. On condition that a channel number set in a specific radio communication system having a name that is selected by a user from among the names stored in the memory is identical to the channel number stored in the memory, and that a group code set in the specific radio communication system is identical to the group code stored in the memory, the control unit performs one-to-one communication with the specific radio communication system.