An electronic device capable of radiating signals toward a plurality of planes is provided, and includes a housing including a first plate and a second plate facing away from the first plate, and an antenna structure positioned in the housing. The antenna structure includes a first printed circuit board (PCB) that includes a first surface facing a first direction, a second PCB that includes a second surface facing a second direction different from the first direction, a flexible PCB (FPCB) that is extended between a first periphery of the first PCB and a second periphery of the second PCB, a first conductive pattern that is formed in the first PCB or on the first surface, a second conductive pattern that is formed in the second PCB or on the second surface, and a wireless communication circuit that is mounted on the first PCB and/or the second PCB.