An electronic device according to the present invention comprises: a first multi-layer printed circuit board (PCB) including a transceiver circuit; a second multi-layer PCB including an antenna; and a connector configured to connect the first multi-layer PCB and the second multi-layer PCB to each other, wherein the first and the second multi-layer PCB include signal transmission lines configuring a vertical connection for signal transfer between different layers, and include multiple adjacent ground patterns configuring a vertical ground connection between the different boards. In order to improve the matching characteristic between the vertically connected signal transmission lines, window regions from which a metal pattern is eliminated are formed at the same positions in different layers of the first and the second multi-layer PCB between the adjacent ground patterns. Therefore, the present invention can provide the connector and the electronic device providing an optimal matching characteristic in vertically connecting the antenna and the transceiver circuit in mmWave bands.