A game controller comprising: a housing having an opening; an operation section at least a portion of which is exposed through the opening; a light-emitting section inside the housing and configured to emit light; and a lightguide including a light-receiving surface configured to receive light generated from the light-emitting section and a light-exiting surface configured to output light received via the light-receiving surface to outside the housing, wherein the lightguide includes: a surrounding portion having the light-exiting surface and surrounding the operation section; and an extended portion extended from the surrounding portion and having the light-receiving surface at a tip portion thereof, wherein the extended portion extends toward the light-emitting section; wherein the surrounding portion has a reflection surface on a reverse side of the light-exiting surface of the surrounding portion, the reflection surface configured to reflect light that has been received via the light-receiving surface and guided through the extended portion toward the light-exiting surface; and wherein one or more cutout is provided on the reflection surface, the one or more cutouts configured to reflect additional portions of said received light that travel rearward to said reverse side of the light-exiting surface forward to the light-exiting surface. a housing having an opening; an operation section at least a portion of which is exposed through the opening; a light-emitting section inside the housing and configured to emit light; and a lightguide including a light-receiving surface configured to receive light generated from the light-emitting section and a light-exiting surface configured to output light received via the light-receiving surface to outside the housing, wherein the lightguide includes: a surrounding portion having the light-exiting surface and surrounding the operation section; and an extended portion extended from the surrounding portion and having the light-receiving surface at a tip portion thereof, wherein the extended portion extends toward the light-emitting section; wherein the surrounding portion has a reflection surface on a reverse side of the light-exiting surface of the surrounding portion, the reflection surface configured to reflect light that has been received via the light-receiving surface and guided through the extended portion toward the light-exiting surface; and wherein one or more cutout is provided on the reflection surface, the one or more cutouts configured to reflect additional portions of said received light that travel rearward to said reverse side of the light-exiting surface forward to the light-exiting surface. a surrounding portion having the light-exiting surface and surrounding the operation section; and an extended portion extended from the surrounding portion and having the light-receiving surface at a tip portion thereof, wherein the extended portion extends toward the light-emitting section; wherein the surrounding portion has a reflection surface on a reverse side of the light-exiting surface of the surrounding portion, the reflection surface configured to reflect light that has been received via the light-receiving surface and guided through the extended portion toward the light-exiting surface; and wherein one or more cutout is provided on the reflection surface, the one or more cutouts configured to reflect additional portions of said received light that travel rearward to said reverse side of the light-exiting surface forward to the light-exiting surface.