An organic electroluminescence display device and a method of manufacturing the same, configured to prevent IR drop of a second electrode by forming an auxiliary electrode line in an organic electroluminescence display device, are disclosed. The display device is also configured to prevent pixel shrinkage caused by deterioration of an organic electroluminescent layer due to transfer of gases into the organic electroluminescent layer. The out-gassing is prevented by providing a plurality of patterns and/or trenches in the auxiliary electrode line to reduce the contact area between the auxiliary electrode line and the second electrode, thereby lowering heat resistance and optimizing heat transfer during a curing process, and also allowing for removal of remaining gases in an organic film.