An image generating apparatus includes an light guide member so arranged as to surround the light-emitting device, wherein a circumferential light-emitting surface of the light guide member is so arranged as to be inclined with respect to a surface on which the light-emitting device is set and a circumferential light guide portion of the light guide member is formed such that a vertical thickness is substantially uniform with respect to the surface on which the light-emitting device is set.