Abstract: Disclosed is a variable phase shifter The variable phase shifter includes a housing; a fixed board unit fixedly installed inside the housing, equipped with an input microstrip line with a via hole for receiving an input signal on one face thereof, and equipped with at least one circular arc-shaped output microstrip line outside the input microstrip line; and a rotating board unit rotatably installed inside the housing while being in contact with the one face of the fixed board unit, equipped with a transmission microstrip line on a face coming in contact with the one face of the fixed board unit, and for providing at least one output signal by making coupling even during rotation thereof.