Disclosed herein is an electronic device including a case having an inner surface and an outer surface thereof; a recess portion recessed at the inner surface of the case toward the outer surface thereof such that a thickness of the case is thinner than that of its surrounding; a light source integrated into the case and disposed to face the recess portion; a circuit board connected to the light source to control power supply for the light source; and an icon generating portion disposed between the recess portion and the light source, and having a transparent pattern corresponding to an icon such that the light of the light source is passed therethrough while forming the icon to be seen at the outer surface of the case.