The present invention discloses an input device with multi pattern layers including an input interface, a first light emitting element for generating a first light beam, a first light guiding plate, a second light emitting element for generating a second light beam, a second light guiding plate, a first circuit board and a second circuit board. The input interface is stacked on the first light guiding plate, and the first light guiding plate is stacked on the second light guiding plate, such that a first space and a second are formed individually at the two ends of the first light guiding plate and the second light guiding plate. The first circuit board and the second circuit board block the first light beam and the second light beam individually by inserting into the first space and the second space individually.