An electronic device is provided. The electronic device includes at least one housing, a display panel disposed to be visible at least in part from an outside in an inner space of the at least one housing, and a digitizer disposed under the display panel. The digitizer includes a dielectric sheet including a plurality of layers, a plurality of first conductive patterns disposed in a first layer of the dielectric sheet and arranged at a predetermined interval to have a length in a first direction, and a plurality of second conductive patterns disposed in a second layer of the dielectric sheet different from the first layer and arranged at a predetermined interval to have a length in a second direction different from the first direction. A thickness of the plurality of second conductive patterns may be thicker than that of the plurality of first conductive patterns.