Indoor lighting device of a vehicle and a lighting control system including the same

An indoor lighting device of a vehicle, comprising:

• a substrate;
• a plurality of light sources assembled with the substrate to be arranged in a row;
• and
• a light guide panel comprising:
• a plurality of incidence parts configured such that light emitted by the light sources is incident upon the plurality of incidence parts,
• a diffusion area part provided behind the incidence parts and configured to diffuse and reflect the light incident upon the incidence parts,
• a visual field area part provided behind the diffusion area part and configured to emit the light diffused and reflected by the diffusion area part to an outside of the indoor lighting device, and
• light diffusion holes provided behind the respective incidence parts and configured such that each of the light diffusion holes is surrounded by a transmission plane, a pair of reflection planes and a diffusion plane.