Light guide body, relay apparatus, and speaker apparatus

A relay apparatus comprising:

• a housing;
• a light signal receiving unit, provided on a first face of the housing, and receiving a light signal from an outside of the housing;
• a light emitting unit emitting light depending on the light signal received by the light signal receiving unit, and
• a light guide body including a long light guide portion, the light guide body comprising:
• an incident portion which is provided at a first end portion in a longitudinal direction of the light guide portion, and through which light enters;
• a first outgoing portion which is adapted to irradiate the light guided by the light guide portion from a first portion provided along the longitudinal direction to an outside;
• and
• a second outgoing portion which is provided at a second end portion in the longitudinal direction of the light guide portion, and which is adapted to irradiate the light to be guided toward the second end portion to the first portion, wherein
• the light guide body is provided on a second face different from the first face of the housing, and
• the light emitted by the light emitting unit enters the incident portion.