An electronic device is disclosed, including: a housing including a first surface, a second surface parallel to the first surface, and a side surface surrounding a space formed between the first surface and the second surface, a first printed circuit board (PCB) disposed on the first surface of the housing, a second PCB disposed on the first surface of the housing and spaced apart from the first PCB, a flexible printed circuit board (FPCB) connecting the first PCB and the second PCB, a conductive sheet disposed on the second surface of the housing and spaced apart from the first PCB, the second PCB, and the FPCB, and an insulating member disposed on one surface of the FPCB and contacting the conductive sheet.