An electronic device includes: a circuit board that has a wireless communication module that is mounted thereon and a feed line that is formed on the circuit board and electrically connected to the wireless communication module; a planar member that is formed with an opening and has a flexible planar piece that is formed to protrude toward the circuit board from an edge of the opening; and an antenna pattern that includes an antenna part that is formed on the planar member and a feeder part that is formed on the flexible planar piece, wherein circuit board and the planar member are arranged to be in positions to flexibly bend the flexible planar piece by the circuit board to electrically connect the feeder part of the antenna pattern and the feed line formed on the circuit board.