Patent ID: 8432524

Claim:
An illuminating device comprising: a case member that has at least a bottom portion and an upper surface of the bottom portion serves as a housing space; a light guide plate that is housed in the housing space, and has at least: a light incident surface which includes a predetermined side end surface; and a light output surface that is perpendicular to the light incident surface and includes a surface which faces toward an illuminated body; and a light source module that includes at least a light-emitting diode which is mounted on the bottom portion of the case member from a rear surface side opposite to the upper surface side of the bottom portion of the case member; and disposed to face the light incident surface of the light guide plate; wherein a predetermined portion of the bottom portion of the case member is provided with a through-hole; and the predetermined portion where the through-hole of the bottom portion of the case member is formed protrudes beyond another portion of the bottom portion of the case member toward the housing space; and the light-emitting diode is protruded toward the housing space via the through-hole of the bottom portion of the case member, thereby the light-emitting diode is disposed to face the light incident surface of the light guide plate.