An apparatus for three-phase power line communication, the apparatus comprising: a connector connected to each phase of a three-phase power line, so that a communication signal transmitted to a communication target device provided to each phase is transferred thereto; and a controller configured to output the communication signal and control the connector, wherein the connector includes: a coupling transformer configured to convert the communication signal output from the controller into a form capable of being transferred to the three-phase power line; and a coupling capacitor configured to convert the communication signal into a form capable of being transferred to each phase, and wherein the controller controls the connector so that the communication signal is output to any one or more selected from the phases, characterized in that the controller further includes a zero cross detector configured to detect a phase of each phase using a zero cross principle, and the controller controls the connector to detect a phase of each phase using the zero cross detector and distinguish a phase to which the communication target device is provided based on the detected phase, so that the communication signal is output to any one or more of the phases, to which the communication target device is provided. a connector connected to each phase of a three-phase power line, so that a communication signal transmitted to a communication target device provided to each phase is transferred thereto; and a controller configured to output the communication signal and control the connector, wherein the connector includes: a coupling transformer configured to convert the communication signal output from the controller into a form capable of being transferred to the three-phase power line; and a coupling capacitor configured to convert the communication signal into a form capable of being transferred to each phase, and wherein the controller controls the connector so that the communication signal is output to any one or more selected from the phases, characterized in that the controller further includes a zero cross detector configured to detect a phase of each phase using a zero cross principle, and the controller controls the connector to detect a phase of each phase using the zero cross detector and distinguish a phase to which the communication target device is provided based on the detected phase, so that the communication signal is output to any one or more of the phases, to which the communication target device is provided. a coupling transformer configured to convert the communication signal output from the controller into a form capable of being transferred to the three-phase power line; and a coupling capacitor configured to convert the communication signal into a form capable of being transferred to each phase, and wherein the controller controls the connector so that the communication signal is output to any one or more selected from the phases, characterized in that the controller further includes a zero cross detector configured to detect a phase of each phase using a zero cross principle, and the controller controls the connector to detect a phase of each phase using the zero cross detector and distinguish a phase to which the communication target device is provided based on the detected phase, so that the communication signal is output to any one or more of the phases, to which the communication target device is provided.