Light-emitting device, optical device, and information processing apparatus

A light-emitting device comprising:

• a light diffusing member that diffuses light emitted from a light source so that an object to be measured is irradiated with the light;
• and
• a holding unit that is provided on a plurality of wires connected to the light source and holds the light diffusing member, wherein
• the light source has an anode electrode and a cathode electrode,
• the plurality of wires include an anode wire connected to the anode electrode and a cathode wire connected to the cathode electrode,
• the light source is a light-emitting element array having a first side surface and a second side surface that face each other and a third side surface and a fourth side surface that connect the first side surface and the second side surface and face each other, and
• the holding unit is provided on the anode wire, and the anode wire is provided on a substrate on both of the first side surface side and the second side surface side.