ILLUMINATION DEVICE

An illumination device includes a housing portion having an opening for inserting an object to be housed, and a bottom face capable of supporting the object to be housed; a light source; and a light-guide plate having a light-emitting face and guiding a light of the light source to emit light from the light-emitting face. The light-guide plate is disposed between the opening of the housing portion and the bottom face, and at least one portion of the light-emitting face of the light-guide plate is arranged to form an acute angle with respect to the bottom face so as to directly irradiate the bottom face from a diagonal direction.