An input device with multiple layers of luminous patterns is provided. The input device includes an input interface, a first light-emitting element, a second light-emitting element, and a light guide plate. The light guide plate includes an upper light-guiding layer, a lower light-guiding layer, and a gap. The upper light-guiding layer and the lower light-guiding layer are separated from each other by the gap. The light guide plate has multiple layers of luminous patterns, which are selectively visible. Consequently, the overall thickness of the input device is reduced.