The present invention provides a light guide body for a microphone that radiates light from a small number of light sources toward a surrounding of a microphone with a uniform quantity of light. The light guide body for the microphone that guides light from one or more light sources which emit light in accordance with operating a state of a microphone unit of the microphone. The light guide body has a plate shape and comprises one or more incident surfaces on which light from the light source is incident, and one or more grooves, each of which includes a reflecting surface that reflects light incident on the incident surface.