Planar illumination device

A planar illumination device, comprising:

• a plurality of light sources;
• a substrate with the plurality of light sources bidimensionally disposed thereupon;
• and
• a reflector provided with a plurality of segments, each of the plurality of segments including a hole corresponding to a respective light source of the plurality of light sources and a reflecting surface extending obliquely from a periphery of the hole, the reflector being provided with outer walls at an entire outer peripheral portion of the reflector, the reflector being disposed at an emission side of the substrate, wherein:
• each hole is formed in a center of the respective segment in a plan view,
• each light source of the plurality of light sources is inserted in the respective hole,
• the reflector has a section that has an irregular portion, which thereby makes the reflector shape not perfectly rectangular,
• one or a plurality of recesses is provided at an outer wall of a segment disposed in the section for accommodating-the light sources or adjusting an amount of light.