A functional device having very good operation durability characteristics, high reliability and satisfactory performance is provided. The functional device provided is a functional device having: at least one functional layer deposited over a substrate wherein an organic material is included; and a plurality of electrodes for bringing the functional layer into action. And this functional device is provided with wiring connected to each of the plurality of electrodes and a barrier metal made to lie between at least one among the plurality of electrodes and the wiring connected thereto.