A data communication device for data communication through radio among a plurality of devices includes a reception circuit receiving data, a storage circuit connected to the reception circuit to store received data, a transmission circuit connected to the storage circuit to search for one data communication device capable of communication therewith, and transmitting the data stored in the storage circuit into the found data communication device, and a control unit connected to the storage circuit, controlling the storage circuit to delete the data transmitted to the found data communication device in response to receiving reception complete data representing reception of data from the found data communication device.