A user-interface device comprises a plurality of indication elements (3), each provided with a visual indication (4), mounted on a structure (5). Operatively associated to at least one indication element (3) is a lighting system (12a, 12b, 14) comprising light-generating means (12a, 12b) in position set at the back of the body of the indication element (3). The lighting system also comprises an optical module (14) made of transparent material associated to the light-generating means (12a, 12b) and configured for changing the direction of rays of light emitted by the generating means (12a, 12b).