An organic light emitting display includes a first substrate; a second substrate opposing the first substrate; and an array of pixels disposed between the first substrate and the second substrate. The display further includes a seal member interposed between and bonded to the first and second substrates to seal a gap between the first and second substrates; a plurality of pillar members positioned between and bonded to the first and second substrates, the plurality of pillar members being positioned outside and spaced from the seal member when viewing in a direction perpendicular to a major surface of the first mother substrate; and a reinforcement member disposed between the first and second substrates, and comprising portions disposed between the seal member and the pillar members. The plurality of pillar members are spaced apart from each other.