An input device and an image display apparatus including the same are disclosed. The input device includes first and second light source units arranged spaced apart from each other and configured to respectively output first light having a first color and second light having a second color, a light guide having a circular shape and configured to receive the first light and the second light, synthesize the first light and the second light and output third synthesized light, a touch sensor configured to detect touch input, and a light source controller configured to control the third light output from the light guide based on touch input detected by the touch sensor. Accordingly, it is possible to improve user convenience.