An electronic device includes an outer case having a sound hole, an acoustic unit included in the outer case in a position corresponding to a position of the sound hole, a sheet member provided between the acoustic unit and the outer case in a position corresponding to the position of the sound hole, and placed over the acoustic unit to cover an outside of an outer edge of the acoustic unit, a mounting portion circumferentially provided on an outer peripheral portion of the sheet member and mounted to the outer case, and an extension portion that extends the mounting portion toward an inner periphery thereof on a side of the sheet member facing the acoustic unit and to which the acoustic unit is mounted.