An organic light emitting display device includes a first substrate, a first electrode layer including a plurality of first electrodes and an auxiliary electrode on the first substrate, the auxiliary electrode being spaced apart from the first electrodes in a plan view, an organic layer on the first electrode layer, the organic layer overlapping the first electrodes of the first electrode layer, a second electrode layer on the first electrode layer, the second electrode layer overlapping the first electrodes and the auxiliary electrode of the first electrode layer, a second substrate on the second electrode layer, and a connection member penetrating through the second electrode layer and through the organic layer to electrically connect the second electrode layer and the auxiliary electrode, the connection member contacting the second substrate.