An organic light-emitting display device (100; 200), comprising: an organic light-emitting unit (130; 230) between two substrates (110, 120; 210, 220); and an adhesive unit (150; 250) configured to adhere the two substrates together, the adhesive unit comprising: three portions (P1, P2, P3) comprising a cured resin used as a base material configured to: suppress infiltration of external moisture into the organic light-emitting unit (130; 230); and decrease separation of at least one of the two substrates (110, 120; 210, 220) from the adhesive unit (150; 250) caused by the external moisture, and a plurality of additives (160; 260) in the resin to absorb moisture or oxygen, and wherein a first portion (P1) of the three portions (P1, P2, P3) is positioned at a center of the adhesive unit , a second portion (P2) of the three portions (P1, P2, P3) is positioned closer to the organic light emitting unit than the first portion (P1) and a third portion (P3) of the three portions (P1, P2, P3) is positioned further from the organic light-emitting unit than the first portion (P1), wherein the concentration of the plurality of additives is highest in the first portion (P1) of the adhesive unit , characterized in that : the concentration of the plurality of additives gradually decreases from the center of the adhesive unit to edges of the adhesive unit , and wherein a width (W2) of the first portion (P1) of the adhesive unit is less than or equal to 50% of an overall width (W1) of the adhesive unit . an organic light-emitting unit (130; 230) between two substrates (110, 120; 210, 220); and an adhesive unit (150; 250) configured to adhere the two substrates together, the adhesive unit comprising: three portions (P1, P2, P3) comprising a cured resin used as a base material configured to: suppress infiltration of external moisture into the organic light-emitting unit (130; 230); and decrease separation of at least one of the two substrates (110, 120; 210, 220) from the adhesive unit (150; 250) caused by the external moisture, and a plurality of additives (160; 260) in the resin to absorb moisture or oxygen, and three portions (P1, P2, P3) comprising a cured resin used as a base material configured to: suppress infiltration of external moisture into the organic light-emitting unit (130; 230); and decrease separation of at least one of the two substrates (110, 120; 210, 220) from the adhesive unit (150; 250) caused by the external moisture, and suppress infiltration of external moisture into the organic light-emitting unit (130; 230); and decrease separation of at least one of the two substrates (110, 120; 210, 220) from the adhesive unit (150; 250) caused by the external moisture, and a plurality of additives (160; 260) in the resin to absorb moisture or oxygen, and wherein a first portion (P1) of the three portions (P1, P2, P3) is positioned at a center of the adhesive unit , a second portion (P2) of the three portions (P1, P2, P3) is positioned closer to the organic light emitting unit than the first portion (P1) and a third portion (P3) of the three portions (P1, P2, P3) is positioned further from the organic light-emitting unit than the first portion (P1), wherein the concentration of the plurality of additives is highest in the first portion (P1) of the adhesive unit , characterized in that : the concentration of the plurality of additives gradually decreases from the center of the adhesive unit to edges of the adhesive unit , and wherein a width (W2) of the first portion (P1) of the adhesive unit is less than or equal to 50% of an overall width (W1) of the adhesive unit . the concentration of the plurality of additives gradually decreases from the center of the adhesive unit to edges of the adhesive unit , and wherein a width (W2) of the first portion (P1) of the adhesive unit is less than or equal to 50% of an overall width (W1) of the adhesive unit . <EOS>