An organic light-emitting display device , comprising: an array substrate ; a pixel drive circuit and an organic light-emitting element (TFT/OLED) on the array substrate ; a passivation layer , consisting of a thin film based on an organosilicon compound, covering the pixel drive circuit and the organic light-emitting element (TFT/OLED) so as to block permeation of moisture; an adhesive layer on the passivation layer ; a lower encapsulation layer under the array substrate ; and a lower adhesive layer attaching the array substrate to the lower encapsulation layer , wherein the adhesive layer comprises a first adhesive layer formed of a resin having moisture absorbent material and attached to a surface of an encapsulation plate facing the array substrate and a second adhesive layer attached to a surface of the first adhesive layer , to the passivation layer , and to a part of the array substrate around the passivation layer , and wherein the second adhesive layer is formed of a transparent resin, wherein an amount of Si-CH 3 bonds in the passivation layer is less than 1/1000 of an amount of Si-O bonds in the passivation layer, wherein the organic light-emitting element includes an anode , an organic emission layer disposed only on the anode exposed via a hole of a bank and a cathode on the organic emission layer , wherein the passivation layer covers an upper surface and a side surfaces of the pixel drive circuit and the organic light-emitting element (TFT/OLED) and contacts with a part of the array substrate around the pixel drive circuit and the organic light-emitting element (TFT/OLED), and wherein the second adhesive layer covers an upper surface and the side surfaces of the passivation layer and contacts the part of the array substrate around the passivation layer . an array substrate ; a pixel drive circuit and an organic light-emitting element (TFT/OLED) on the array substrate ; a passivation layer , consisting of a thin film based on an organosilicon compound, covering the pixel drive circuit and the organic light-emitting element (TFT/OLED) so as to block permeation of moisture; an adhesive layer on the passivation layer ; a lower encapsulation layer under the array substrate ; and a lower adhesive layer attaching the array substrate to the lower encapsulation layer , wherein the adhesive layer comprises a first adhesive layer formed of a resin having moisture absorbent material and attached to a surface of an encapsulation plate facing the array substrate and a second adhesive layer attached to a surface of the first adhesive layer , to the passivation layer , and to a part of the array substrate around the passivation layer , and wherein the second adhesive layer is formed of a transparent resin, wherein an amount of Si-CH 3 bonds in the passivation layer is less than 1/1000 of an amount of Si-O bonds in the passivation layer, wherein the organic light-emitting element includes an anode , an organic emission layer disposed only on the anode exposed via a hole of a bank and a cathode on the organic emission layer , wherein the passivation layer covers an upper surface and a side surfaces of the pixel drive circuit and the organic light-emitting element (TFT/OLED) and contacts with a part of the array substrate around the pixel drive circuit and the organic light-emitting element (TFT/OLED), and wherein the second adhesive layer covers an upper surface and the side surfaces of the passivation layer and contacts the part of the array substrate around the passivation layer . <EOS>