An electronic device includes a housing providing a front surface and a rear surface, an antenna including a printed circuit board within the housing and including a first surface facing the front surface and a second surface facing the rear surface. The printed circuit board includes a first conductive layer including a first antenna element and a second antenna element that do not overlap each other when viewed from above the first surface, a second conductive layer operating as a ground plane, and a dielectric between the first and second conductive layers. A conductive pattern is located between the front surface and the second surface when the first surface faces the rear surface and is located between the rear surface and the second surface when the first surface faces the front surface. The conductive pattern overlaps a part of the second conductive layer when viewed from above the first surface.