PURPOSE: A transmitting device in which an output unit and a front end unit are connected as a connector are provided to directly connect the output unit and the front end unit by using a connector without using a cable between an output unit and a front end unit within a relay device. CONSTITUTION: A front end unit(150) has a transmission input port and a receiving side output port. An output port for the transmission side of a first amplifier and an input port for the transmission side of the front end unit face each other. An input port for the receiving side of a second amplifier and an output port for the receiving side of the front end unit. A first connector(160) connects the output port for the transmission side of the first amplifier and the input port for the transmission side of the front end unit. A second connector(170) connects the input port for receiving side of the second amplifier and the output port for the receiving side of the front end unit.
