Disclosed is an organic light-emitting display device capable of blocking the infiltration of oxygen and moisture and effectively preventing light leakage. The device includes a first substrate with first and second pixel regions wherein a plurality of organic light-emitting diodes are formed. The device further includes a non-pixel region around the first and the second pixel-regions, a second substrate disposed on the upper part of the first substrate to be overlapped with the first and the second pixel regions and a part of the non-pixel region, and a frit provided between the first and the second substrates to be overlapped with at least one of the first and the second pixel regions and at least a part of the non-pixel region. The first and the second substrates are adhered to each other by the fit in the part corresponding to the non-pixel region.