An electronic device is provided. The electronic device includes a foldable housing. The foldable housing includes a first housing including a first display and an illuminance sensor on a front surface, and a second housing, adjacent to the first housing, including a hole formed through a front surface and a rear surface of the second housing. The front surface of the first housing faces the front surface of the second housing when the second housing is folded in a first direction with respect to the first housing, and a rear surface of the first housing faces the rear surface of the second housing when the second housing is folded in a second direction with respect to the first housing.