An electronic device is provided. The electronic device includes a housing including an outer housing portion and an inner housing portion which is disposed inside the outer housing portion and includes at least one protrusion protruding in an inward direction, a circuit board positioned in the housing, at least one optical element disposed within the housing at a position corresponding to the at least one protrusion and mounted on the circuit board, and a conductor electrically connecting the circuit board and the at least one optical element, wherein the inner housing portion includes a first coating layer disposed to surround the at least one optical element, the first coating layer including a first light transmittance.