A method for connecting, by a first Bluetooth device of a first piconet, a link between a second Bluetooth device of a second piconet and a third Bluetooth device of a third piconet that cannot directly communicate with each other. The connecting method comprises the steps of: upon receiving a connection request message from the second Bluetooth device requesting connection with the third Bluetooth device, transmitting the connection request message from the first Bluetooth device to the third Bluetooth device; and upon receiving a response to the connection request message from the third Bluetooth device, transmitting the response from the first Bluetooth device to the second Bluetooth device.