Light-emitting device and planar light source

A light-emitting device comprising:

• a wiring board comprising an interconnect layer;
• a plurality of light-emitting elements disposed on the wiring board and electrically coupled to the interconnect layer of the wiring board;
• a light-reflecting member disposed on the wiring board and covering a lateral surface of each of the plurality of light-emitting elements;
• a plurality of light-transmitting layers each located above an emission surface of a corresponding one of the plurality of light-emitting elements;
• a plurality of light-reflecting layers disposed on the plurality of light-transmitting layers, respectively;
• a light-diffusing layer disposed above the plurality of light-reflecting layers and the light-reflecting member;
• and
• a low-refractive-index layer located between the light-reflecting member and the light-diffusing layer and around each pair of one of the plurality of light-transmitting layers and one of the plurality of light-reflecting layers, the low-refractive-index layer having a refractive index lower than that of the plurality of light-transmitting layers,
• wherein
• each of the plurality of light-reflecting layers has a width in a cross-sectional view thereof which is equal to or greater than that of a corresponding one of the plurality of light-transmitting layers.