A top emission type organic electroluminescent display device includes a first substrate including a pixel region, a switching thin film transistor and a driving thin film transistor in the pixel region on the first substrate, a passivation layer covering the switching thin film transistor and the driving thin film transistor and exposing a drain electrode of the driving thin film transistor, a connection electrode on the passivation layer and contacting the drain electrode of the driving thin film transistor, a partition wall corresponding to a border between adjacent pixel regions and overlapping an edge portion of the connection electrode, an x-ray shield layer on the connection electrode between adjacent partition walls, the x-ray shield layer automatically patterned in the pixel region due to the partition wall, a first electrode on the x-ray shield layer, a bank covering the partition wall and contacting an edge portion of the first electrode, an organic emission layer on the first electrode between adjacent banks, a second electrode on the organic emission layer, and a second substrate facing the first substrate and being transparent.