An IC card-type radio communication device includes a main body of equipment, a storage unit, a sound input unit, a sound output unit and a modulation-demodulation unit. The main body of equipment has an interface which is in accordance with a predetermined standard and forms a physical shape which is in accordance with the standard. The main body of equipment is inserted into an entry installed on an external terminal unit. The storage unit is installed on the main body of equipment and stores an attribute information and an information necessary for data communication with the terminal unit. The sound input unit inputs a sound signal when a conversation is executed and the sound output unit outputs the sound signal. The modulation-demodulation unit modulates and demodulates data of the terminal unit on the basis of the information stored in the storage unit when the main body of equipment is inserted into the entry installed on the terminal unit, and modulates and demodulates the sound signal when the conversation is executed.